My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
Deacon mark

On Thursday, August 3, 2023 at 7:40:36 AM UTC-7, Mark Cleary wrote:
> My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> Deacon mark
There are several materials that the pads can be made from. The racing pads are normally metallic and are most prone to that squealing. I'm sure that Andrew can sell you different pads than what you presently have and give you any other ideas. But in my experience, putting the brakes on hard always results in squealing.

On Thursday, August 3, 2023 at 10:16:44 AM UTC-5, Tom Kunich wrote:
> On Thursday, August 3, 2023 at 7:40:36 AM UTC-7, Mark Cleary wrote:
> > My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> > Deacon mark
> There are several materials that the pads can be made from. The racing pads are normally metallic and are most prone to that squealing. I'm sure that Andrew can sell you different pads than what you presently have and give you any other ideas. But in my experience, putting the brakes on hard always results in squealing.
I am using organic resin pads. Supposed to be the least amount of noise. Metallic cause the most noise I understand but I live in the flatlands and resin pads are the standard here. I am willing to try metal or ceramic pads but my understanding is they are worse noise makers.
Deacon mark

On Thursday, August 3, 2023 at 9:12:44 AM UTC-7, Mark Cleary wrote:
> On Thursday, August 3, 2023 at 10:16:44 AM UTC-5, Tom Kunich wrote:
> > On Thursday, August 3, 2023 at 7:40:36 AM UTC-7, Mark Cleary wrote:
> > > My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> > > Deacon mark
> > There are several materials that the pads can be made from. The racing pads are normally metallic and are most prone to that squealing. I'm sure that Andrew can sell you different pads than what you presently have and give you any other ideas. But in my experience, putting the brakes on hard always results in squealing.
> I am using organic resin pads. Supposed to be the least amount of noise. Metallic cause the most noise I understand but I live in the flatlands and resin pads are the standard here. I am willing to try metal or ceramic pads but my understanding is they are worse noise makers.
> Deacon mark

On flat ground the harder pads don't howl as much. The squealing comes from the catching and releasing of the pad against the disk. I always would check the "fit" of the pads on the retaining screw. The looser the fit, the more likely it is to make squeals, though there are a lot of things involved. The coarseness of the finish on the disk, the number of cooling slots, the pad material and the fit of the pad in the caliper (actuator) and the distance the caliper is into the disk.

On Thursday, August 3, 2023 at 9:12:44 AM UTC-7, Mark Cleary wrote:
> On Thursday, August 3, 2023 at 10:16:44 AM UTC-5, Tom Kunich wrote:
> > On Thursday, August 3, 2023 at 7:40:36 AM UTC-7, Mark Cleary wrote:
> > > My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> > > Deacon mark
> > There are several materials that the pads can be made from. The racing pads are normally metallic and are most prone to that squealing. I'm sure that Andrew can sell you different pads than what you presently have and give you any other ideas. But in my experience, putting the brakes on hard always results in squealing.
> I am using organic resin pads. Supposed to be the least amount of noise. Metallic cause the most noise I understand but I live in the flatlands and resin pads are the standard here. I am willing to try metal or ceramic pads but my understanding is they are worse noise makers.
> Deacon mark

By the way, I just remembered - I could tell when the brake was going to squeal through practice and I would brake faster or slower than that point. You probably have the same ability.

Mark Cleary <deaconmjc08@gmail.com> wrote:
> My Shimano road hydraulic front brake is really squealing. I put new
> identical pads in and really over past 400 miles they have gotten worse.
> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> used some sandpaper to get them clean. To me they look clean not
> contaminated, but that is what they claim is the problem. The rotor is
> true the brake pads don't rub but sort of hit the side of one of the
> pads, but just minor and it doesn't cause the wheel to slow down just
> spinning it. I have come to believe with small tolerances of clearance
> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> Deacon mark
>
Squealing is generally muck, and also in general brakes like to be used ie
in general harder than gentle. Which will generally clean and silent disks.

Talking of which in general disks don’t at least in my experience like
products even disk cleaning products. I wash off with water and change pads
on my bikes that’s it.

If a pad has got contaminated then that’s probably game over really for the
pads.

Roger Merriman

On Thursday, August 3, 2023 at 4:40:36 PM UTC+2, Mark Cleary wrote:
> My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> Deacon mark

Clean your rotor with iso propanol using a scotch brite and sand your pads with fresh sandpaper after that you have to bed in the pads/rotor again properly.

Lou

On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <roger@sarlet.com>
wrote:

>Mark Cleary <deaconmjc08@gmail.com> wrote:
>> My Shimano road hydraulic front brake is really squealing. I put new
>> identical pads in and really over past 400 miles they have gotten worse.
>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>> used some sandpaper to get them clean. To me they look clean not
>> contaminated, but that is what they claim is the problem. The rotor is
>> true the brake pads don't rub but sort of hit the side of one of the
>> pads, but just minor and it doesn't cause the wheel to slow down just
>> spinning it. I have come to believe with small tolerances of clearance
>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>> Deacon mark
>>
>Squealing is generally muck, and also in general brakes like to be used ie
>in general harder than gentle. Which will generally clean and silent disks.
>
>Talking of which in general disks don’t at least in my experience like
>products even disk cleaning products. I wash off with water and change pads
>on my bikes that’s it.
>
>If a pad has got contaminated then that’s probably game over really for the
>pads.
>
>Roger Merriman

My resin pads squeal horribly when they're wet.

On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
> wrote:
> >Mark Cleary <deaco...@gmail.com> wrote:
> >> My Shimano road hydraulic front brake is really squealing. I put new
> >> identical pads in and really over past 400 miles they have gotten worse.
> >> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> >> used some sandpaper to get them clean. To me they look clean not
> >> contaminated, but that is what they claim is the problem. The rotor is
> >> true the brake pads don't rub but sort of hit the side of one of the
> >> pads, but just minor and it doesn't cause the wheel to slow down just
> >> spinning it. I have come to believe with small tolerances of clearance
> >> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> >> Deacon mark
> >>
> >Squealing is generally muck, and also in general brakes like to be used ie
> >in general harder than gentle. Which will generally clean and silent disks.
> >
> >Talking of which in general disks don’t at least in my experience like
> >products even disk cleaning products. I wash off with water and change pads
> >on my bikes that’s it.
> >
> >If a pad has got contaminated then that’s probably game over really for the
> >pads.
> >
> >Roger Merriman
> My resin pads squeal horribly when they're wet.

Yes when wet I am pretty sure any pad will squeal.

Lou, I did take the pad and run in on my disk sander and that did not help. I will try the scotch bite pad trick though.

Another thought is the rotors. They are 160 and I don't want to replace it as such nothing seems wrong but would that possibly help. I note that rotors are all over the place in price. Some a low as $12 to almost $80 for a rotor. I have centerlock and are more expensive rotors necessarily better?
Deacon mark

On 8/3/2023 1:37 PM, Mark Cleary wrote:
> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
>> wrote:
>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>> identical pads in and really over past 400 miles they have gotten worse.
>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>>>> used some sandpaper to get them clean. To me they look clean not
>>>> contaminated, but that is what they claim is the problem. The rotor is
>>>> true the brake pads don't rub but sort of hit the side of one of the
>>>> pads, but just minor and it doesn't cause the wheel to slow down just
>>>> spinning it. I have come to believe with small tolerances of clearance
>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>> Deacon mark
>>>>
>>> Squealing is generally muck, and also in general brakes like to be used ie
>>> in general harder than gentle. Which will generally clean and silent disks.
>>>
>>> Talking of which in general disks don’t at least in my experience like
>>> products even disk cleaning products. I wash off with water and change pads
>>> on my bikes that’s it.
>>>
>>> If a pad has got contaminated then that’s probably game over really for the
>>> pads.
>>>
>>> Roger Merriman
>> My resin pads squeal horribly when they're wet.
>
> Yes when wet I am pretty sure any pad will squeal.
>
> Lou, I did take the pad and run in on my disk sander and that did not help. I will try the scotch bite pad trick though.
>
> Another thought is the rotors. They are 160 and I don't want to replace it as such nothing seems wrong but would that possibly help. I note that rotors are all over the place in price. Some a low as $12 to almost $80 for a rotor. I have centerlock and are more expensive rotors necessarily better?
> Deacon mark
>

Carbon center carrier, interesting patterns but no
difference in performance.

--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971

On 8/3/2023 1:44 PM, Tom Kunich wrote:
> On Thursday, August 3, 2023 at 9:12:44 AM UTC-7, Mark Cleary wrote:
>> On Thursday, August 3, 2023 at 10:16:44 AM UTC-5, Tom Kunich wrote:
>>> On Thursday, August 3, 2023 at 7:40:36 AM UTC-7, Mark Cleary wrote:
>>>> My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>> Deacon mark
>>> There are several materials that the pads can be made from. The racing pads are normally metallic and are most prone to that squealing. I'm sure that Andrew can sell you different pads than what you presently have and give you any other ideas. But in my experience, putting the brakes on hard always results in squealing.
>> I am using organic resin pads. Supposed to be the least amount of noise. Metallic cause the most noise I understand but I live in the flatlands and resin pads are the standard here. I am willing to try metal or ceramic pads but my understanding is they are worse noise makers.
>> Deacon mark
>
> On flat ground the harder pads don't howl as much. The squealing comes from the catching and releasing of the pad against the disk. I always would check the "fit" of the pads on the retaining screw. The looser the fit, the more likely it is to make squeals, though there are a lot of things involved. The coarseness of the finish on the disk, the number of cooling slots, the pad material and the fit of the pad in the caliper (actuator) and the distance the caliper is into the disk.

It occurs to me, car disc brakes shoes are often installed with an
anti-squeal goop of some kind on the backside. I've never read an
explanation, but I've assumed it adds some damping to any vibration.

But I don't think I've heard of that for bike disc brakes.

--
- Frank Krygowski

On 8/3/2023 2:04 PM, Lou Holtman wrote:
> On Thursday, August 3, 2023 at 4:40:36 PM UTC+2, Mark Cleary wrote:
>> My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>> Deacon mark
>
> Clean your rotor with iso propanol using a scotch brite and sand your pads with fresh sandpaper after that you have to bed in the pads/rotor again properly.

So, another reason to not love disc brakes.

--
- Frank Krygowski

On Thursday, August 3, 2023 at 8:37:09 PM UTC+2, Mark Cleary wrote:
> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
> > On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
> > wrote:
> > >Mark Cleary <deaco...@gmail.com> wrote:
> > >> My Shimano road hydraulic front brake is really squealing. I put new
> > >> identical pads in and really over past 400 miles they have gotten worse.
> > >> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> > >> used some sandpaper to get them clean. To me they look clean not
> > >> contaminated, but that is what they claim is the problem. The rotor is
> > >> true the brake pads don't rub but sort of hit the side of one of the
> > >> pads, but just minor and it doesn't cause the wheel to slow down just
> > >> spinning it. I have come to believe with small tolerances of clearance
> > >> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> > >> Deacon mark
> > >>
> > >Squealing is generally muck, and also in general brakes like to be used ie
> > >in general harder than gentle. Which will generally clean and silent disks.
> > >
> > >Talking of which in general disks don’t at least in my experience like
> > >products even disk cleaning products. I wash off with water and change pads
> > >on my bikes that’s it.
> > >
> > >If a pad has got contaminated then that’s probably game over really for the
> > >pads.
> > >
> > >Roger Merriman
> > My resin pads squeal horribly when they're wet.
> Yes when wet I am pretty sure any pad will squeal.
>
> Lou, I did take the pad and run in on my disk sander and that did not help. I will try the scotch bite pad trick though.
>
> Another thought is the rotors. They are 160 and I don't want to replace it as such nothing seems wrong but would that possibly help. I note that rotors are all over the place in price. Some a low as $12 to almost $80 for a rotor. I have centerlock and are more expensive rotors necessarily better?
> Deacon mark

Key word is bedding in properly after you ‘resetted’ the pads and rotor by sanding the pads and cleaning the rotor thoroughly with iso propanol and scrotch brite.

Lou

On Thursday, August 3, 2023 at 8:58:08 PM UTC+2, Frank Krygowski wrote:
> On 8/3/2023 2:04 PM, Lou Holtman wrote:
> > On Thursday, August 3, 2023 at 4:40:36 PM UTC+2, Mark Cleary wrote:
> >> My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> >> Deacon mark
> >
> > Clean your rotor with iso propanol using a scotch brite and sand your pads with fresh sandpaper after that you have to bed in the pads/rotor again properly.
> So, another reason to not love disc brakes.
>
> --
> - Frank Krygowski

It is a ten minutes job. After the downpour ride yesterday it took me more time to clean my brake surfaces of my rims and pulling out the aluminum particles out of my brake pads of my front rim brakes. Yes I know, you don’t ride when it is raining.

Lou

On Thu, 3 Aug 2023 13:29:19 -0700 (PDT), Lou Holtman
<lou.holtman@gmail.com> wrote:

>On Thursday, August 3, 2023 at 8:58:08?PM UTC+2, Frank Krygowski wrote:
>> On 8/3/2023 2:04 PM, Lou Holtman wrote:
>> > On Thursday, August 3, 2023 at 4:40:36?PM UTC+2, Mark Cleary wrote:
>> >> My Shimano road hydraulic front brake is really squealing. I put new identical pads in and really over past 400 miles they have gotten worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it and even used some sandpaper to get them clean. To me they look clean not contaminated, but that is what they claim is the problem. The rotor is true the brake pads don't rub but sort of hit the side of one of the pads, but just minor and it doesn't cause the wheel to slow down just spinning it. I have come to believe with small tolerances of clearance between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>> >> Deacon mark
>> >
>> > Clean your rotor with iso propanol using a scotch brite and sand your pads with fresh sandpaper after that you have to bed in the pads/rotor again properly.
>> So, another reason to not love disc brakes.
>>
>> --
>> - Frank Krygowski
>
>It is a ten minutes job. After the downpour ride yesterday it took me more time to clean my brake surfaces of my rims and pulling out the aluminum particles out of my brake pads of my front rim brakes. Yes I know, you don’t ride when it is raining.
>
>Lou

I've never cleaned my brake pads. Once in a while, maybe two or three
times a year, I've cleaned the disks.

Lou Holtman <lou.holtman@gmail.com> wrote:
> On Thursday, August 3, 2023 at 8:37:09 PM UTC+2, Mark Cleary wrote:
>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
>>> wrote:
>>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>>> identical pads in and really over past 400 miles they have gotten worse.
>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>>>>> used some sandpaper to get them clean. To me they look clean not
>>>>> contaminated, but that is what they claim is the problem. The rotor is
>>>>> true the brake pads don't rub but sort of hit the side of one of the
>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
>>>>> spinning it. I have come to believe with small tolerances of clearance
>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>>> Deacon mark
>>>>>
>>>> Squealing is generally muck, and also in general brakes like to be used ie
>>>> in general harder than gentle. Which will generally clean and silent disks.
>>>>
>>>> Talking of which in general disks don’t at least in my experience like
>>>> products even disk cleaning products. I wash off with water and change pads
>>>> on my bikes that’s it.
>>>>
>>>> If a pad has got contaminated then that’s probably game over really for the
>>>> pads.
>>>>
>>>> Roger Merriman
>>> My resin pads squeal horribly when they're wet.
>> Yes when wet I am pretty sure any pad will squeal.
>>
>> Lou, I did take the pad and run in on my disk sander and that did not
>> help. I will try the scotch bite pad trick though.
>>
>> Another thought is the rotors. They are 160 and I don't want to replace
>> it as such nothing seems wrong but would that possibly help. I note that
>> rotors are all over the place in price. Some a low as $12 to almost $80
>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
>> Deacon mark
>
> Key word is bedding in properly after you ‘resetted’ the pads and rotor
> by sanding the pads and cleaning the rotor thoroughly with iso propanol and scrotch brite.
>
> Lou
>

My wife never managed this so I used to do it for her! Sometimes giving her
some pads I’d part worn which seemed to do the trick.

And she rode so gently and brakes so gently that wear is minimal.

Roger Merriman

Mark Cleary <deaconmjc08@gmail.com> wrote:
> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
>> wrote:
>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>> identical pads in and really over past 400 miles they have gotten worse.
>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>>>> used some sandpaper to get them clean. To me they look clean not
>>>> contaminated, but that is what they claim is the problem. The rotor is
>>>> true the brake pads don't rub but sort of hit the side of one of the
>>>> pads, but just minor and it doesn't cause the wheel to slow down just
>>>> spinning it. I have come to believe with small tolerances of clearance
>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>> Deacon mark
>>>>
>>> Squealing is generally muck, and also in general brakes like to be used ie
>>> in general harder than gentle. Which will generally clean and silent disks.
>>>
>>> Talking of which in general disks don’t at least in my experience like
>>> products even disk cleaning products. I wash off with water and change pads
>>> on my bikes that’s it.
>>>
>>> If a pad has got contaminated then that’s probably game over really for the
>>> pads.
>>>
>>> Roger Merriman
>> My resin pads squeal horribly when they're wet.
>
> Yes when wet I am pretty sure any pad will squeal.

Once the rotor is clear of stuff be it water or muck I find it’s quiet,
possible not absolutely silent but certainly not squealing. On the road at
least, on the trails wet days get grit which grinds though squealing is
relatively rare personally.
>
> Lou, I did take the pad and run in on my disk sander and that did not
> help. I will try the scotch bite pad trick though.
>
> Another thought is the rotors. They are 160 and I don't want to replace
> it as such nothing seems wrong but would that possibly help. I note that
> rotors are all over the place in price. Some a low as $12 to almost $80
> for a rotor. I have centerlock and are more expensive rotors necessarily better?
> Deacon mark
>
Define better? Rotors last for ages so I’ve only replaced one set. Almost
certainly into marginal gains for most folks.

Roger Merriman

Catrike Rider <soloman@drafting.not> wrote:
> On Thu, 3 Aug 2023 13:29:19 -0700 (PDT), Lou Holtman
> <lou.holtman@gmail.com> wrote:
>
>> On Thursday, August 3, 2023 at 8:58:08?PM UTC+2, Frank Krygowski wrote:
>>> On 8/3/2023 2:04 PM, Lou Holtman wrote:
>>>> On Thursday, August 3, 2023 at 4:40:36?PM UTC+2, Mark Cleary wrote:
>>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>>> identical pads in and really over past 400 miles they have gotten
>>>>> worse. I cleaned the rotor with ISO Alcohol. I clean the pads with it
>>>>> and even used some sandpaper to get them clean. To me they look clean
>>>>> not contaminated, but that is what they claim is the problem. The
>>>>> rotor is true the brake pads don't rub but sort of hit the side of
>>>>> one of the pads, but just minor and it doesn't cause the wheel to
>>>>> slow down just spinning it. I have come to believe with small
>>>>> tolerances of clearance between pads can cause a slight rub nothing
>>>>> drastic for sure. I am at a loss.
>>>>> Deacon mark
>>>>
>>>> Clean your rotor with iso propanol using a scotch brite and sand your
>>>> pads with fresh sandpaper after that you have to bed in the pads/rotor again properly.
>>> So, another reason to not love disc brakes.
>>>
>>> --
>>> - Frank Krygowski
>>
>> It is a ten minutes job. After the downpour ride yesterday it took me
>> more time to clean my brake surfaces of my rims and pulling out the
>> aluminum particles out of my brake pads of my front rim brakes. Yes I
>> know, you don’t ride when it is raining.
>>
>> Lou
>
> I've never cleaned my brake pads. Once in a while, maybe two or three
> times a year, I've cleaned the disks.
>
I have if they have got contaminants ie oil be that bike or road muck, but
it’s less than a year job.

Wash bikes after use Gravel/MTB and change pads that’s it, commute bike
doesn’t even get cleaned! As long as they are used they are absolutely fine
and don’t need any cleaning fluids or what not.

Just making life difficult for one’s self really.

Roger Merriman

On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
> Mark Cleary <deaco...@gmail.com> wrote:
> > On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
> >> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
> >> wrote:
> >>> Mark Cleary <deaco...@gmail.com> wrote:
> >>>> My Shimano road hydraulic front brake is really squealing. I put new
> >>>> identical pads in and really over past 400 miles they have gotten worse.
> >>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> >>>> used some sandpaper to get them clean. To me they look clean not
> >>>> contaminated, but that is what they claim is the problem. The rotor is
> >>>> true the brake pads don't rub but sort of hit the side of one of the
> >>>> pads, but just minor and it doesn't cause the wheel to slow down just
> >>>> spinning it. I have come to believe with small tolerances of clearance
> >>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> >>>> Deacon mark
> >>>>
> >>> Squealing is generally muck, and also in general brakes like to be used ie
> >>> in general harder than gentle. Which will generally clean and silent disks.
> >>>
> >>> Talking of which in general disks don’t at least in my experience like
> >>> products even disk cleaning products. I wash off with water and change pads
> >>> on my bikes that’s it.
> >>>
> >>> If a pad has got contaminated then that’s probably game over really for the
> >>> pads.
> >>>
> >>> Roger Merriman
> >> My resin pads squeal horribly when they're wet.
> >
> > Yes when wet I am pretty sure any pad will squeal.
> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
> possible not absolutely silent but certainly not squealing. On the road at
> least, on the trails wet days get grit which grinds though squealing is
> relatively rare personally.
> >
> > Lou, I did take the pad and run in on my disk sander and that did not
> > help. I will try the scotch bite pad trick though.
> >
> > Another thought is the rotors. They are 160 and I don't want to replace
> > it as such nothing seems wrong but would that possibly help. I note that
> > rotors are all over the place in price. Some a low as $12 to almost $80
> > for a rotor. I have centerlock and are more expensive rotors necessarily better?
> > Deacon mark
> >
> Define better? Rotors last for ages so I’ve only replaced one set.. Almost
> certainly into marginal gains for most folks.
>
> Roger Merriman

There a speed and braking force that causes that howling. I was usually able to squeeze harder or less so on the brake to stay out of that noise zone.

Tom Kunich <cyclintom@gmail.com> wrote:
> On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
>> Mark Cleary <deaco...@gmail.com> wrote:
>>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
>>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
>>>> wrote:
>>>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>>>> identical pads in and really over past 400 miles they have gotten worse.
>>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>>>>>> used some sandpaper to get them clean. To me they look clean not
>>>>>> contaminated, but that is what they claim is the problem. The rotor is
>>>>>> true the brake pads don't rub but sort of hit the side of one of the
>>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
>>>>>> spinning it. I have come to believe with small tolerances of clearance
>>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>>>> Deacon mark
>>>>>>
>>>>> Squealing is generally muck, and also in general brakes like to be used ie
>>>>> in general harder than gentle. Which will generally clean and silent disks.
>>>>>
>>>>> Talking of which in general disks don’t at least in my experience like
>>>>> products even disk cleaning products. I wash off with water and change pads
>>>>> on my bikes that’s it.
>>>>>
>>>>> If a pad has got contaminated then that’s probably game over really for the
>>>>> pads.
>>>>>
>>>>> Roger Merriman
>>>> My resin pads squeal horribly when they're wet.
>>>
>>> Yes when wet I am pretty sure any pad will squeal.
>> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
>> possible not absolutely silent but certainly not squealing. On the road at
>> least, on the trails wet days get grit which grinds though squealing is
>> relatively rare personally.
>>>
>>> Lou, I did take the pad and run in on my disk sander and that did not
>>> help. I will try the scotch bite pad trick though.
>>>
>>> Another thought is the rotors. They are 160 and I don't want to replace
>>> it as such nothing seems wrong but would that possibly help. I note that
>>> rotors are all over the place in price. Some a low as $12 to almost $80
>>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
>>> Deacon mark
>>>
>> Define better? Rotors last for ages so I’ve only replaced one set. Almost
>> certainly into marginal gains for most folks.
>>
>> Roger Merriman
>
> There a speed and braking force that causes that howling. I was usually
> able to squeeze harder or less so on the brake to stay out of that noise zone.
>
Found that more with rim brakes, to be honest. But yes sometimes if it’s
wet mucky if one is gentle it will be quiet, this said needs to clean the
rotor/pads and so it’s only delaying it, ie what it likes is to be used.

Roger Merriman

On Tuesday, August 8, 2023 at 12:32:16 PM UTC-5, Roger Meriman wrote:
> Tom Kunich <cycl...@gmail.com> wrote:
> > On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
> >> Mark Cleary <deaco...@gmail.com> wrote:
> >>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
> >>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
> >>>> wrote:
> >>>>> Mark Cleary <deaco...@gmail.com> wrote:
> >>>>>> My Shimano road hydraulic front brake is really squealing. I put new
> >>>>>> identical pads in and really over past 400 miles they have gotten worse.
> >>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> >>>>>> used some sandpaper to get them clean. To me they look clean not
> >>>>>> contaminated, but that is what they claim is the problem. The rotor is
> >>>>>> true the brake pads don't rub but sort of hit the side of one of the
> >>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
> >>>>>> spinning it. I have come to believe with small tolerances of clearance
> >>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> >>>>>> Deacon mark
> >>>>>>
> >>>>> Squealing is generally muck, and also in general brakes like to be used ie
> >>>>> in general harder than gentle. Which will generally clean and silent disks.
> >>>>>
> >>>>> Talking of which in general disks don’t at least in my experience like
> >>>>> products even disk cleaning products. I wash off with water and change pads
> >>>>> on my bikes that’s it.
> >>>>>
> >>>>> If a pad has got contaminated then that’s probably game over really for the
> >>>>> pads.
> >>>>>
> >>>>> Roger Merriman
> >>>> My resin pads squeal horribly when they're wet.
> >>>
> >>> Yes when wet I am pretty sure any pad will squeal.
> >> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
> >> possible not absolutely silent but certainly not squealing. On the road at
> >> least, on the trails wet days get grit which grinds though squealing is
> >> relatively rare personally.
> >>>
> >>> Lou, I did take the pad and run in on my disk sander and that did not
> >>> help. I will try the scotch bite pad trick though.
> >>>
> >>> Another thought is the rotors. They are 160 and I don't want to replace
> >>> it as such nothing seems wrong but would that possibly help. I note that
> >>> rotors are all over the place in price. Some a low as $12 to almost $80
> >>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
> >>> Deacon mark
> >>>
> >> Define better? Rotors last for ages so I’ve only replaced one set. Almost
> >> certainly into marginal gains for most folks.
> >>
> >> Roger Merriman
> >
> > There a speed and braking force that causes that howling. I was usually
> > able to squeeze harder or less so on the brake to stay out of that noise zone.
> >
> Found that more with rim brakes, to be honest. But yes sometimes if it’s
> wet mucky if one is gentle it will be quiet, this said needs to clean the
> rotor/pads and so it’s only delaying it, ie what it likes is to be used.
>
> Roger Merriman

Ok today on my 63 mile ride not much braking and if I slowed down a bit with the ( front is the squeaker0 it would not make any noise. However, as I increased braking power to slopping, they squeaked still pretty loud. They certainly do the job and grab the rotor and stop no performance problems, but it is Illinois no mountains. I tried a few times to get going then let them squeak like made stopping to see if putting more force on would eventually stop the noise. This had zero effect.

Somehow, I think it could be the rotor is not quite flat but there is no brake rub if I just spin the wheel. The rotor is not exactly true but pretty little amount of movement. Nothing you can see unless you look very closely spinning wheel in good light. Then it is almost nothing has to be less even 1/2 of a mm of movement. By wheel truing standards it would be completely true.

I could try new pads and/or a different rotor but that cost money. My guess is a 2 piece rotor is going to go for over $40. Frankly the noise does not really mother me a solo rider in the middle of nowhere and the brake lever action at the handlebars is perfect. But stopping in my driveway at home I can wake the neighbors up if it is early. I am up for some real technical information on what to do, including live with it.
Deacon Mark

On Tuesday, August 8, 2023 at 11:33:40 AM UTC-7, Mark Cleary wrote:
> On Tuesday, August 8, 2023 at 12:32:16 PM UTC-5, Roger Meriman wrote:
> > Tom Kunich <cycl...@gmail.com> wrote:
> > > On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
> > >> Mark Cleary <deaco...@gmail.com> wrote:
> > >>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
> > >>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
> > >>>> wrote:
> > >>>>> Mark Cleary <deaco...@gmail.com> wrote:
> > >>>>>> My Shimano road hydraulic front brake is really squealing. I put new
> > >>>>>> identical pads in and really over past 400 miles they have gotten worse.
> > >>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> > >>>>>> used some sandpaper to get them clean. To me they look clean not
> > >>>>>> contaminated, but that is what they claim is the problem. The rotor is
> > >>>>>> true the brake pads don't rub but sort of hit the side of one of the
> > >>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
> > >>>>>> spinning it. I have come to believe with small tolerances of clearance
> > >>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> > >>>>>> Deacon mark
> > >>>>>>
> > >>>>> Squealing is generally muck, and also in general brakes like to be used ie
> > >>>>> in general harder than gentle. Which will generally clean and silent disks.
> > >>>>>
> > >>>>> Talking of which in general disks don’t at least in my experience like
> > >>>>> products even disk cleaning products. I wash off with water and change pads
> > >>>>> on my bikes that’s it.
> > >>>>>
> > >>>>> If a pad has got contaminated then that’s probably game over really for the
> > >>>>> pads.
> > >>>>>
> > >>>>> Roger Merriman
> > >>>> My resin pads squeal horribly when they're wet.
> > >>>
> > >>> Yes when wet I am pretty sure any pad will squeal.
> > >> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
> > >> possible not absolutely silent but certainly not squealing. On the road at
> > >> least, on the trails wet days get grit which grinds though squealing is
> > >> relatively rare personally.
> > >>>
> > >>> Lou, I did take the pad and run in on my disk sander and that did not
> > >>> help. I will try the scotch bite pad trick though.
> > >>>
> > >>> Another thought is the rotors. They are 160 and I don't want to replace
> > >>> it as such nothing seems wrong but would that possibly help. I note that
> > >>> rotors are all over the place in price. Some a low as $12 to almost $80
> > >>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
> > >>> Deacon mark
> > >>>
> > >> Define better? Rotors last for ages so I’ve only replaced one set. Almost
> > >> certainly into marginal gains for most folks.
> > >>
> > >> Roger Merriman
> > >
> > > There a speed and braking force that causes that howling. I was usually
> > > able to squeeze harder or less so on the brake to stay out of that noise zone.
> > >
> > Found that more with rim brakes, to be honest. But yes sometimes if it’s
> > wet mucky if one is gentle it will be quiet, this said needs to clean the
> > rotor/pads and so it’s only delaying it, ie what it likes is to be used.
> >
> > Roger Merriman
> Ok today on my 63 mile ride not much braking and if I slowed down a bit with the ( front is the squeaker0 it would not make any noise. However, as I increased braking power to slopping, they squeaked still pretty loud. They certainly do the job and grab the rotor and stop no performance problems, but it is Illinois no mountains. I tried a few times to get going then let them squeak like made stopping to see if putting more force on would eventually stop the noise. This had zero effect.
>
> Somehow, I think it could be the rotor is not quite flat but there is no brake rub if I just spin the wheel. The rotor is not exactly true but pretty little amount of movement. Nothing you can see unless you look very closely spinning wheel in good light. Then it is almost nothing has to be less even 1/2 of a mm of movement. By wheel truing standards it would be completely true.
>
> I could try new pads and/or a different rotor but that cost money. My guess is a 2 piece rotor is going to go for over $40. Frankly the noise does not really mother me a solo rider in the middle of nowhere and the brake lever action at the handlebars is perfect. But stopping in my driveway at home I can wake the neighbors up if it is early. I am up for some real technical information on what to do, including live with it.
> Deacon Mark

I did not have a lot of problems with the disk setups beyond the fact that they were too powerful and too likely to lock the wheels if you were applying the brakes and hit a bump. Rim brakes seemed just as powerful if properly adjusted but a lot less sensitive to bumps etc.

Mark Cleary <deaconmjc08@gmail.com> wrote:
> On Tuesday, August 8, 2023 at 12:32:16 PM UTC-5, Roger Meriman wrote:
>> Tom Kunich <cycl...@gmail.com> wrote:
>>> On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
>>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
>>>>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
>>>>>> wrote:
>>>>>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>>>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>>>>>> identical pads in and really over past 400 miles they have gotten worse.
>>>>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>>>>>>>> used some sandpaper to get them clean. To me they look clean not
>>>>>>>> contaminated, but that is what they claim is the problem. The rotor is
>>>>>>>> true the brake pads don't rub but sort of hit the side of one of the
>>>>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
>>>>>>>> spinning it. I have come to believe with small tolerances of clearance
>>>>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>>>>>> Deacon mark
>>>>>>>>
>>>>>>> Squealing is generally muck, and also in general brakes like to be used ie
>>>>>>> in general harder than gentle. Which will generally clean and silent disks.
>>>>>>>
>>>>>>> Talking of which in general disks don’t at least in my experience like
>>>>>>> products even disk cleaning products. I wash off with water and change pads
>>>>>>> on my bikes that’s it.
>>>>>>>
>>>>>>> If a pad has got contaminated then that’s probably game over really for the
>>>>>>> pads.
>>>>>>>
>>>>>>> Roger Merriman
>>>>>> My resin pads squeal horribly when they're wet.
>>>>>
>>>>> Yes when wet I am pretty sure any pad will squeal.
>>>> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
>>>> possible not absolutely silent but certainly not squealing. On the road at
>>>> least, on the trails wet days get grit which grinds though squealing is
>>>> relatively rare personally.
>>>>>
>>>>> Lou, I did take the pad and run in on my disk sander and that did not
>>>>> help. I will try the scotch bite pad trick though.
>>>>>
>>>>> Another thought is the rotors. They are 160 and I don't want to replace
>>>>> it as such nothing seems wrong but would that possibly help. I note that
>>>>> rotors are all over the place in price. Some a low as $12 to almost $80
>>>>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
>>>>> Deacon mark
>>>>>
>>>> Define better? Rotors last for ages so I’ve only replaced one set. Almost
>>>> certainly into marginal gains for most folks.
>>>>
>>>> Roger Merriman
>>>
>>> There a speed and braking force that causes that howling. I was usually
>>> able to squeeze harder or less so on the brake to stay out of that noise zone.
>>>
>> Found that more with rim brakes, to be honest. But yes sometimes if it’s
>> wet mucky if one is gentle it will be quiet, this said needs to clean the
>> rotor/pads and so it’s only delaying it, ie what it likes is to be used.
>>
>> Roger Merriman
>
> Ok today on my 63 mile ride not much braking and if I slowed down a bit
> with the ( front is the squeaker0 it would not make any noise. However,
> as I increased braking power to slopping, they squeaked still pretty
> loud. They certainly do the job and grab the rotor and stop no
> performance problems, but it is Illinois no mountains. I tried a few
> times to get going then let them squeak like made stopping to see if
> putting more force on would eventually stop the noise. This had zero effect.
>
> Somehow, I think it could be the rotor is not quite flat but there is no
> brake rub if I just spin the wheel. The rotor is not exactly true but
> pretty little amount of movement. Nothing you can see unless you look
> very closely spinning wheel in good light. Then it is almost nothing has
> to be less even 1/2 of a mm of movement. By wheel truing standards it
> would be completely true.
>
> I could try new pads and/or a different rotor but that cost money. My
> guess is a 2 piece rotor is going to go for over $40. Frankly the noise
> does not really mother me a solo rider in the middle of nowhere and the
> brake lever action at the handlebars is perfect. But stopping in my
> driveway at home I can wake the neighbors up if it is early. I am up for
> some real technical information on what to do, including live with it.
> Deacon Mark
>

I suspect your overthinking it, as long as it brakes fine. In general they
don’t like being fussed with and really dislike oils and so on, and
certainly in my experience aren’t wildly keen on cleaning products even if
they are apparently for cleaning disks!

Ie wash them off as with bike but keep chain oil well away!

On 8/9/2023 5:24 AM, Roger Meriman wrote:
> Mark Cleary <deaconmjc08@gmail.com> wrote:
>> On Tuesday, August 8, 2023 at 12:32:16 PM UTC-5, Roger Meriman wrote:
>>> Tom Kunich <cycl...@gmail.com> wrote:
>>>> On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
>>>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>>>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
>>>>>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
>>>>>>> wrote:
>>>>>>>> Mark Cleary <deaco...@gmail.com> wrote:
>>>>>>>>> My Shimano road hydraulic front brake is really squealing. I put new
>>>>>>>>> identical pads in and really over past 400 miles they have gotten worse.
>>>>>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
>>>>>>>>> used some sandpaper to get them clean. To me they look clean not
>>>>>>>>> contaminated, but that is what they claim is the problem. The rotor is
>>>>>>>>> true the brake pads don't rub but sort of hit the side of one of the
>>>>>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
>>>>>>>>> spinning it. I have come to believe with small tolerances of clearance
>>>>>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
>>>>>>>>> Deacon mark
>>>>>>>>>
>>>>>>>> Squealing is generally muck, and also in general brakes like to be used ie
>>>>>>>> in general harder than gentle. Which will generally clean and silent disks.
>>>>>>>>
>>>>>>>> Talking of which in general disks don’t at least in my experience like
>>>>>>>> products even disk cleaning products. I wash off with water and change pads
>>>>>>>> on my bikes that’s it.
>>>>>>>>
>>>>>>>> If a pad has got contaminated then that’s probably game over really for the
>>>>>>>> pads.
>>>>>>>>
>>>>>>>> Roger Merriman
>>>>>>> My resin pads squeal horribly when they're wet.
>>>>>>
>>>>>> Yes when wet I am pretty sure any pad will squeal.
>>>>> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
>>>>> possible not absolutely silent but certainly not squealing. On the road at
>>>>> least, on the trails wet days get grit which grinds though squealing is
>>>>> relatively rare personally.
>>>>>>
>>>>>> Lou, I did take the pad and run in on my disk sander and that did not
>>>>>> help. I will try the scotch bite pad trick though.
>>>>>>
>>>>>> Another thought is the rotors. They are 160 and I don't want to replace
>>>>>> it as such nothing seems wrong but would that possibly help. I note that
>>>>>> rotors are all over the place in price. Some a low as $12 to almost $80
>>>>>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
>>>>>> Deacon mark
>>>>>>
>>>>> Define better? Rotors last for ages so I’ve only replaced one set. Almost
>>>>> certainly into marginal gains for most folks.
>>>>>
>>>>> Roger Merriman
>>>>
>>>> There a speed and braking force that causes that howling. I was usually
>>>> able to squeeze harder or less so on the brake to stay out of that noise zone.
>>>>
>>> Found that more with rim brakes, to be honest. But yes sometimes if it’s
>>> wet mucky if one is gentle it will be quiet, this said needs to clean the
>>> rotor/pads and so it’s only delaying it, ie what it likes is to be used.
>>>
>>> Roger Merriman
>>
>> Ok today on my 63 mile ride not much braking and if I slowed down a bit
>> with the ( front is the squeaker0 it would not make any noise. However,
>> as I increased braking power to slopping, they squeaked still pretty
>> loud. They certainly do the job and grab the rotor and stop no
>> performance problems, but it is Illinois no mountains. I tried a few
>> times to get going then let them squeak like made stopping to see if
>> putting more force on would eventually stop the noise. This had zero effect.
>>
>> Somehow, I think it could be the rotor is not quite flat but there is no
>> brake rub if I just spin the wheel. The rotor is not exactly true but
>> pretty little amount of movement. Nothing you can see unless you look
>> very closely spinning wheel in good light. Then it is almost nothing has
>> to be less even 1/2 of a mm of movement. By wheel truing standards it
>> would be completely true.
>>
>> I could try new pads and/or a different rotor but that cost money. My
>> guess is a 2 piece rotor is going to go for over $40. Frankly the noise
>> does not really mother me a solo rider in the middle of nowhere and the
>> brake lever action at the handlebars is perfect. But stopping in my
>> driveway at home I can wake the neighbors up if it is early. I am up for
>> some real technical information on what to do, including live with it.
>> Deacon Mark
>>
>
> I suspect your overthinking it, as long as it brakes fine.

A badly squealing brake would bother me terribly, whether it brakes fine
or not.

There was one club ride where my rim brakes suddenly began squealing
much like Mark described. It was embarrassing, because it was a rather
somber memorial ride for a good friend and club member who had passed away.

So at one of the many stops on the ride, I took out my multi-tool and
quickly added a bit of toe in to the brake shoes, curing the problem in
short order.

I prefer equipment whose problems are easy to diagnose.

--
- Frank Krygowski

On Wednesday, August 9, 2023 at 5:47:57 PM UTC+2, Frank Krygowski wrote:
> On 8/9/2023 5:24 AM, Roger Meriman wrote:
> > Mark Cleary <deaco...@gmail.com> wrote:
> >> On Tuesday, August 8, 2023 at 12:32:16 PM UTC-5, Roger Meriman wrote:
> >>> Tom Kunich <cycl...@gmail.com> wrote:
> >>>> On Thursday, August 3, 2023 at 2:26:23 PM UTC-7, Roger Meriman wrote:
> >>>>> Mark Cleary <deaco...@gmail.com> wrote:
> >>>>>> On Thursday, August 3, 2023 at 1:09:56 PM UTC-5, Catrike Rider wrote:
> >>>>>>> On Thu, 03 Aug 2023 18:01:14 GMT, Roger Meriman <ro...@sarlet.com>
> >>>>>>> wrote:
> >>>>>>>> Mark Cleary <deaco...@gmail.com> wrote:
> >>>>>>>>> My Shimano road hydraulic front brake is really squealing. I put new
> >>>>>>>>> identical pads in and really over past 400 miles they have gotten worse.
> >>>>>>>>> I cleaned the rotor with ISO Alcohol. I clean the pads with it and even
> >>>>>>>>> used some sandpaper to get them clean. To me they look clean not
> >>>>>>>>> contaminated, but that is what they claim is the problem. The rotor is
> >>>>>>>>> true the brake pads don't rub but sort of hit the side of one of the
> >>>>>>>>> pads, but just minor and it doesn't cause the wheel to slow down just
> >>>>>>>>> spinning it. I have come to believe with small tolerances of clearance
> >>>>>>>>> between pads can cause a slight rub nothing drastic for sure. I am at a loss.
> >>>>>>>>> Deacon mark
> >>>>>>>>>
> >>>>>>>> Squealing is generally muck, and also in general brakes like to be used ie
> >>>>>>>> in general harder than gentle. Which will generally clean and silent disks.
> >>>>>>>>
> >>>>>>>> Talking of which in general disks don’t at least in my experience like
> >>>>>>>> products even disk cleaning products. I wash off with water and change pads
> >>>>>>>> on my bikes that’s it.
> >>>>>>>>
> >>>>>>>> If a pad has got contaminated then that’s probably game over really for the
> >>>>>>>> pads.
> >>>>>>>>
> >>>>>>>> Roger Merriman
> >>>>>>> My resin pads squeal horribly when they're wet.
> >>>>>>
> >>>>>> Yes when wet I am pretty sure any pad will squeal.
> >>>>> Once the rotor is clear of stuff be it water or muck I find it’s quiet,
> >>>>> possible not absolutely silent but certainly not squealing. On the road at
> >>>>> least, on the trails wet days get grit which grinds though squealing is
> >>>>> relatively rare personally.
> >>>>>>
> >>>>>> Lou, I did take the pad and run in on my disk sander and that did not
> >>>>>> help. I will try the scotch bite pad trick though.
> >>>>>>
> >>>>>> Another thought is the rotors. They are 160 and I don't want to replace
> >>>>>> it as such nothing seems wrong but would that possibly help. I note that
> >>>>>> rotors are all over the place in price. Some a low as $12 to almost $80
> >>>>>> for a rotor. I have centerlock and are more expensive rotors necessarily better?
> >>>>>> Deacon mark
> >>>>>>
> >>>>> Define better? Rotors last for ages so I’ve only replaced one set. Almost
> >>>>> certainly into marginal gains for most folks.
> >>>>>
> >>>>> Roger Merriman
> >>>>
> >>>> There a speed and braking force that causes that howling. I was usually
> >>>> able to squeeze harder or less so on the brake to stay out of that noise zone.
> >>>>
> >>> Found that more with rim brakes, to be honest. But yes sometimes if it’s
> >>> wet mucky if one is gentle it will be quiet, this said needs to clean the
> >>> rotor/pads and so it’s only delaying it, ie what it likes is to be used.
> >>>
> >>> Roger Merriman
> >>
> >> Ok today on my 63 mile ride not much braking and if I slowed down a bit
> >> with the ( front is the squeaker0 it would not make any noise. However,
> >> as I increased braking power to slopping, they squeaked still pretty
> >> loud. They certainly do the job and grab the rotor and stop no
> >> performance problems, but it is Illinois no mountains. I tried a few
> >> times to get going then let them squeak like made stopping to see if
> >> putting more force on would eventually stop the noise. This had zero effect.
> >>
> >> Somehow, I think it could be the rotor is not quite flat but there is no
> >> brake rub if I just spin the wheel. The rotor is not exactly true but
> >> pretty little amount of movement. Nothing you can see unless you look
> >> very closely spinning wheel in good light. Then it is almost nothing has
> >> to be less even 1/2 of a mm of movement. By wheel truing standards it
> >> would be completely true.
> >>
> >> I could try new pads and/or a different rotor but that cost money. My
> >> guess is a 2 piece rotor is going to go for over $40. Frankly the noise
> >> does not really mother me a solo rider in the middle of nowhere and the
> >> brake lever action at the handlebars is perfect. But stopping in my
> >> driveway at home I can wake the neighbors up if it is early. I am up for
> >> some real technical information on what to do, including live with it.
> >> Deacon Mark
> >>
> >
> > I suspect your overthinking it, as long as it brakes fine.
> A badly squealing brake would bother me terribly, whether it brakes fine
> or not.
>
> There was one club ride where my rim brakes suddenly began squealing
> much like Mark described. It was embarrassing, because it was a rather
> somber memorial ride for a good friend and club member who had passed away.
>
> So at one of the many stops on the ride, I took out my multi-tool and
> quickly added a bit of toe in to the brake shoes, curing the problem in
> short order.
>
> I prefer equipment whose problems are easy to diagnose.
>
> --
> - Frank Krygowski

Like you did Mark should fix the problem. Squealing disks brakes in the dry is unnecessary.

Lou