Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA

Lou, life is too short to ride shitty tires.

On Friday, August 27, 2021 at 9:29:06 AM UTC-7, lou.h...@gmail.com wrote:
> Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>
> Lou, life is too short to ride shitty tires.

Didn't they test any Michelin? That's weird.

-- Jay Beattie.

On Friday, August 27, 2021 at 6:58:12 PM UTC+2, jbeattie wrote:
> On Friday, August 27, 2021 at 9:29:06 AM UTC-7, lou.h...@gmail.com wrote:
> > Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> > https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
> >
> > Lou, life is too short to ride shitty tires.
> Didn't they test any Michelin? That's weird.
>
> -- Jay Beattie.

It is what it is. Maybe because Michelins are not very popular over here. I don't know.

Lou

On 8/27/2021 12:29 PM, Lou Holtman wrote:
> Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>
> Lou, life is too short to ride shitty tires.
>
AFAIK our cycling magazines seldom have such data. I'm a bit jealous.

Was the rolling resistance test a standard rotating drum test?

--
- Frank Krygowski

On 8/27/2021 9:29 AM, Lou Holtman wrote:
> Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>
> Lou, life is too short to ride shitty tires.

I've moved to all Schwalbe, good to see how well the Pro One did.

On Friday, August 27, 2021 at 7:13:39 PM UTC+2, Frank Krygowski wrote:
> On 8/27/2021 12:29 PM, Lou Holtman wrote:
> > Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> > https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
> >
> > Lou, life is too short to ride shitty tires.
> >
> AFAIK our cycling magazines seldom have such data. I'm a bit jealous.
>
> Was the rolling resistance test a standard rotating drum test?
>
> --
> - Frank Krygowski

You would like that magazine. In every issue also nice travel stories.

Lou

On Friday, August 27, 2021 at 7:14:07 PM UTC+2, sms wrote:
> On 8/27/2021 9:29 AM, Lou Holtman wrote:
> > Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> > https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
> >
> > Lou, life is too short to ride shitty tires.
> I've moved to all Schwalbe, good to see how well the Pro One did.

Also a popular tire here. They also make very good gravel tires.

Lou

Lou Holtman <lou.holtman@gmail.com> wrote:
> Just read the latest tire test in TOUR magazine. They tested 28 mm tires
> at 35 km/hr and total weight of 85 kg. They asked a number of tire
> manufactures to send in their high end tire and a medium end tire. The
> medium end tire cost on average half to two third the cost of their high
> end tire. I found the differences remarkable. Everyone that uses a power
> meter knows that increasing average power with 10-15 watts is more than
> significant. Again the Continental GP5000 is a no brainer.
> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>
> Lou, life is too short to ride shitty tires.
>

How are they measuring? I agree 10/15 watts is fairly huge.

Roger Merriman.

On 8/27/2021 10:24 AM, Lou Holtman wrote:
> On Friday, August 27, 2021 at 7:14:07 PM UTC+2, sms wrote:
>> On 8/27/2021 9:29 AM, Lou Holtman wrote:
>>> Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
>>> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>>>
>>> Lou, life is too short to ride shitty tires.
>> I've moved to all Schwalbe, good to see how well the Pro One did.
>
> Also a popular tire here. They also make very good gravel tires.

I don't know about Continental, but Schwalbe has been struggling to keep
up with demand for tires and tubes, with popular products being out of
stock for months, then briefly becoming available before going out of
stock again.

On Friday, August 27, 2021 at 8:10:41 PM UTC+2, Roger Merriman wrote:
> Lou Holtman <lou.h...@gmail.com> wrote:
> > Just read the latest tire test in TOUR magazine. They tested 28 mm tires
> > at 35 km/hr and total weight of 85 kg. They asked a number of tire
> > manufactures to send in their high end tire and a medium end tire. The
> > medium end tire cost on average half to two third the cost of their high
> > end tire. I found the differences remarkable. Everyone that uses a power
> > meter knows that increasing average power with 10-15 watts is more than
> > significant. Again the Continental GP5000 is a no brainer.
> > https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
> >
> > Lou, life is too short to ride shitty tires.
> >
> How are they measuring? I agree 10/15 watts is fairly huge.
>
> Roger Merriman.

Succes:

https://photos.app.goo.gl/gTxSocL23H3e2xsj8

Lou

sms <scharf.steven@geemail.com> writes:

> I've moved to all Schwalbe, good to see how well the Pro One did.

Runner-up after the Conti 5000, IIRC.

Axel

On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
> sms <scharf...@geemail.com> writes:
>
> > I've moved to all Schwalbe, good to see how well the Pro One did.
> Runner-up after the Conti 5000, IIRC.
>
> Axel

BTW, this is the test: https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin

Actually the Specialized Turbo cotton had lower RR than the Conti GP5000 on rough pavement and apparently a watt or so less on smooth pavement, but the winner over-all is the Schwalbe Pro One -- if you want a tire with good grip (which I do). But which Pro One? There are three of them -- tube, tubeless and TT. https://www.schwalbetires.com/bike_tires/racing_tires They're all wickedly expensive in the US.

My German is rudimentary at best. Were these all tubed tires? And I assume that all tests were run with the same tubes?

-- Jay Beattie.

On 28/8/21 2:29 am, Lou Holtman wrote:
> Just read the latest tire test in TOUR magazine. They tested 28 mm tires at 35 km/hr and total weight of 85 kg. They asked a number of tire manufactures to send in their high end tire and a medium end tire. The medium end tire cost on average half to two third the cost of their high end tire. I found the differences remarkable. Everyone that uses a power meter knows that increasing average power with 10-15 watts is more than significant. Again the Continental GP5000 is a no brainer.
> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>
> Lou, life is too short to ride shitty tires.
>

All those brands and a more here.

https://www.bicyclerollingresistance.com/road-bike-reviews

--
JS

On Saturday, August 28, 2021 at 1:33:12 AM UTC+2, jbeattie wrote:
> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
> > sms <scharf...@geemail.com> writes:
> >
> > > I've moved to all Schwalbe, good to see how well the Pro One did.
> > Runner-up after the Conti 5000, IIRC.
> >
> > Axel
> BTW, this is the test: https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin
>
> Actually the Specialized Turbo cotton had lower RR than the Conti GP5000 on rough pavement and apparently a watt or so less on smooth pavement, but the winner over-all is the Schwalbe Pro One -- if you want a tire with good grip (which I do). But which Pro One? There are three of them -- tube, tubeless and TT. https://www.schwalbetires.com/bike_tires/racing_tires They're all wickedly expensive in the US.
>
> My German is rudimentary at best. Were these all tubed tires? And I assume that all tests were run with the same tubes?
>
> -- Jay Beattie.

Well they also judged the tires on 'Pannensicherheit', 'Trockenhaftung' und 'Gewicht'. (flat resistance, grip (dry) and weight. According to their rules the Continental GP5000 was the 'Testsieger' (winner). The Schwalbe Pro One was the close runner up. All the tests were performed with 137 gr Butyl tube (heavy), 5.5 bar, 35 km/hr and 85 kg weight.
Here are all results. The lower the number, the better the tire:

https://photos.app.goo.gl/28KExMfx8jo6HdmJ6

Lou

On 8/28/2021 2:55 AM, Lou Holtman wrote:
> On Saturday, August 28, 2021 at 1:33:12 AM UTC+2, jbeattie wrote:
>> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
>>> sms <scharf...@geemail.com> writes:
>>>
>>>> I've moved to all Schwalbe, good to see how well the Pro One did.
>>> Runner-up after the Conti 5000, IIRC.
>>>
>>> Axel
>> BTW, this is the test: https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin ...

Interesting. But ...

> ... All the tests were performed with 137 gr Butyl tube (heavy), 5.5 bar, 35 km/hr and 85 kg weight.
> Here are all results. The lower the number, the better the tire:
>
> https://photos.app.goo.gl/28KExMfx8jo6HdmJ6

The 35 km/hr tells me it was a rotating drum test.

--
- Frank Krygowski

On Friday, August 27, 2021 at 4:33:12 PM UTC-7, jbeattie wrote:
> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
> > sms <scharf...@geemail.com> writes:
> >
> > > I've moved to all Schwalbe, good to see how well the Pro One did.
> > Runner-up after the Conti 5000, IIRC.
> >
> > Axel
> BTW, this is the test: https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin
>
> Actually the Specialized Turbo cotton had lower RR than the Conti GP5000 on rough pavement and apparently a watt or so less on smooth pavement, but the winner over-all is the Schwalbe Pro One -- if you want a tire with good grip (which I do). But which Pro One? There are three of them -- tube, tubeless and TT. https://www.schwalbetires.com/bike_tires/racing_tires They're all wickedly expensive in the US.
>
> My German is rudimentary at best. Were these all tubed tires? And I assume that all tests were run with the same tubes?

I don't know where it is now but the tests I read showed a rather startling advantage to the Vittoria Corsa G+. Almost half of what a Continental GP5000 was.

On 8/27/2021 3:10 PM, Lou Holtman wrote:
> On Friday, August 27, 2021 at 8:10:41 PM UTC+2, Roger Merriman wrote:
>> Lou Holtman <lou.h...@gmail.com> wrote:
>>> Just read the latest tire test in TOUR magazine. They tested 28 mm tires
>>> at 35 km/hr and total weight of 85 kg. They asked a number of tire
>>> manufactures to send in their high end tire and a medium end tire. The
>>> medium end tire cost on average half to two third the cost of their high
>>> end tire. I found the differences remarkable. Everyone that uses a power
>>> meter knows that increasing average power with 10-15 watts is more than
>>> significant. Again the Continental GP5000 is a no brainer.
>>> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>>>
>>> Lou, life is too short to ride shitty tires.
>>>
>> How are they measuring? I agree 10/15 watts is fairly huge.
>>
>> Roger Merriman.
>
>
> Succes:
>
> https://photos.app.goo.gl/gTxSocL23H3e2xsj8

Ah, I think I see. They measure the _force_ of rolling resistance using
the pendulum rig, then multiply that force (probably assuming it's
constant) with the assumed 35 km/hr velocity to get the power lost in
Watts at that speed.

--
- Frank Krygowski

On 8/28/2021 11:17 AM, Frank Krygowski wrote:
> On 8/27/2021 3:10 PM, Lou Holtman wrote:
>> On Friday, August 27, 2021 at 8:10:41 PM UTC+2, Roger Merriman wrote:
>>> Lou Holtman <lou.h...@gmail.com> wrote:
>>>> Just read the latest tire test in TOUR magazine. They tested 28 mm
>>>> tires
>>>> at 35 km/hr and total weight of 85 kg. They asked a number of tire
>>>> manufactures to send in their high end tire and a medium end tire. The
>>>> medium end tire cost on average half to two third the cost of their
>>>> high
>>>> end tire. I found the differences remarkable. Everyone that uses a
>>>> power
>>>> meter knows that increasing average power with 10-15 watts is more than
>>>> significant. Again the Continental GP5000 is a no brainer.
>>>> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>>>>
>>>> Lou, life is too short to ride shitty tires.
>>>>
>>> How are they measuring? I agree 10/15 watts is fairly huge.
>>>
>>> Roger Merriman.
>>
>>
>> Succes:
>>
>> https://photos.app.goo.gl/gTxSocL23H3e2xsj8
>
> Ah, I think I see. They measure the _force_ of rolling resistance using
> the pendulum rig, then multiply that force (probably assuming it's
> constant) with the assumed 35 km/hr velocity to get the power lost in
> Watts at that speed.

This blog is interesting and relevant:
https://blog.silca.cc/part-4b-rolling-resistance-and-impedance

--
- Frank Krygowski

Frank Krygowski <frkrygow@sbcglobal.net> wrote:
> On 8/28/2021 11:17 AM, Frank Krygowski wrote:
>> On 8/27/2021 3:10 PM, Lou Holtman wrote:
>>> On Friday, August 27, 2021 at 8:10:41 PM UTC+2, Roger Merriman wrote:
>>>> Lou Holtman <lou.h...@gmail.com> wrote:
>>>>> Just read the latest tire test in TOUR magazine. They tested 28 mm
>>>>> tires
>>>>> at 35 km/hr and total weight of 85 kg. They asked a number of tire
>>>>> manufactures to send in their high end tire and a medium end tire. The
>>>>> medium end tire cost on average half to two third the cost of their
>>>>> high
>>>>> end tire. I found the differences remarkable. Everyone that uses a
>>>>> power
>>>>> meter knows that increasing average power with 10-15 watts is more than
>>>>> significant. Again the Continental GP5000 is a no brainer.
>>>>> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>>>>>
>>>>> Lou, life is too short to ride shitty tires.
>>>>>
>>>> How are they measuring? I agree 10/15 watts is fairly huge.
>>>>
>>>> Roger Merriman.
>>>
>>>
>>> Succes:
>>>
>>> https://photos.app.goo.gl/gTxSocL23H3e2xsj8
>>
>> Ah, I think I see. They measure the _force_ of rolling resistance using
>> the pendulum rig, then multiply that force (probably assuming it's
>> constant) with the assumed 35 km/hr velocity to get the power lost in
>> Watts at that speed.
>
> This blog is interesting and relevant:
> https://blog.silca.cc/part-4b-rolling-resistance-and-impedance
>
>

As an electrical engineer, I don’t like their use of the term impedance.
Impedance implies a combination of lossy (resistive) and lossless
(reactive) elements, while this is just describing two different lossy
elements which combine to produce a non-linear loss.

On 8/28/21 11:40 AM, Ralph Barone wrote:
> Frank Krygowski <frkrygow@sbcglobal.net> wrote:
>> On 8/28/2021 11:17 AM, Frank Krygowski wrote:
>>> On 8/27/2021 3:10 PM, Lou Holtman wrote:
>>>> On Friday, August 27, 2021 at 8:10:41 PM UTC+2, Roger Merriman wrote:
>>>>> Lou Holtman <lou.h...@gmail.com> wrote:
>>>>>> Just read the latest tire test in TOUR magazine. They tested 28 mm
>>>>>> tires
>>>>>> at 35 km/hr and total weight of 85 kg. They asked a number of tire
>>>>>> manufactures to send in their high end tire and a medium end tire. The
>>>>>> medium end tire cost on average half to two third the cost of their
>>>>>> high
>>>>>> end tire. I found the differences remarkable. Everyone that uses a
>>>>>> power
>>>>>> meter knows that increasing average power with 10-15 watts is more than
>>>>>> significant. Again the Continental GP5000 is a no brainer.
>>>>>> https://photos.app.goo.gl/RNAuxNK8XZu4wmNQA
>>>>>>
>>>>>> Lou, life is too short to ride shitty tires.
>>>>>>
>>>>> How are they measuring? I agree 10/15 watts is fairly huge.
>>>>>
>>>>> Roger Merriman.
>>>>
>>>>
>>>> Succes:
>>>>
>>>> https://photos.app.goo.gl/gTxSocL23H3e2xsj8
>>>
>>> Ah, I think I see. They measure the _force_ of rolling resistance using
>>> the pendulum rig, then multiply that force (probably assuming it's
>>> constant) with the assumed 35 km/hr velocity to get the power lost in
>>> Watts at that speed.
>>
>> This blog is interesting and relevant:
>> https://blog.silca.cc/part-4b-rolling-resistance-and-impedance
>>
>>
>
> As an electrical engineer, I don’t like their use of the term impedance.
> Impedance implies a combination of lossy (resistive) and lossless
> (reactive) elements, while this is just describing two different lossy
> elements which combine to produce a non-linear loss.
>

No, no, Impedance is a rock band:

https://www.youtube.com/watch?v=492iAQU9aJY

And another in Russia but less rock:

https://www.youtube.com/watch?v=zMyKUZTDwjo

--
Regards, Joerg (also an EE)

http://www.analogconsultants.com/

On 8/28/21 8:14 AM, Tom Kunich wrote:
> On Friday, August 27, 2021 at 4:33:12 PM UTC-7, jbeattie wrote:
>> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
>>> sms <scharf...@geemail.com> writes:
>>>
>>>> I've moved to all Schwalbe, good to see how well the Pro One did.
>>> Runner-up after the Conti 5000, IIRC.
>>>
>>> Axel
>> BTW, this is the test: https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin
>>
>> Actually the Specialized Turbo cotton had lower RR than the Conti GP5000 on rough pavement and apparently a watt or so less on smooth pavement, but the winner over-all is the Schwalbe Pro One -- if you want a tire with good grip (which I do). But which Pro One? There are three of them -- tube, tubeless and TT. https://www.schwalbetires.com/bike_tires/racing_tires They're all wickedly expensive in the US.

Bicycle tires in general are outlandishly pricey when compared to motor
vehicle tires on a dollar per mile basis.

>>
>> My German is rudimentary at best. Were these all tubed tires? And I assume that all tests were run with the same tubes?
>
> I don't know where it is now but the tests I read showed a rather startling advantage to the Vittoria Corsa G+. Almost half of what a Continental GP5000 was.
>

To me the most important factor is dollars per mile. I get 1200mi out of
a Vittoria Zaffiro. Always waiting for a sale, I usually buy them under
$20. So about $0.016/mile. That's for the rear tire, the front last much
longer, about 4x.

The 2nd important parameter is side wall quality. While I did milk
2500mi out of a Conti Gatorskin (alas, at $45 a pop) three out of four
prematurely dropped out with side wall failure. One had less than 1000mi
on it. That's when I gave up on them.

--
Regards, Joerg

http://www.analogconsultants.com/

On Saturday, August 28, 2021 at 11:45:10 PM UTC+2, Joerg wrote:
> On 8/28/21 8:14 AM, Tom Kunich wrote:
> > On Friday, August 27, 2021 at 4:33:12 PM UTC-7, jbeattie wrote:
> >> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
> >>> sms <scharf...@geemail.com> writes:
> >>>
> >>>> I've moved to all Schwalbe, good to see how well the Pro One did.
> >>> Runner-up after the Conti 5000, IIRC.
> >>>
> >>> Axel
> >> BTW, this is the test: https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin
> >>
> >> Actually the Specialized Turbo cotton had lower RR than the Conti GP5000 on rough pavement and apparently a watt or so less on smooth pavement, but the winner over-all is the Schwalbe Pro One -- if you want a tire with good grip (which I do). But which Pro One? There are three of them -- tube, tubeless and TT. https://www.schwalbetires.com/bike_tires/racing_tires They're all wickedly expensive in the US.
> Bicycle tires in general are outlandishly pricey when compared to motor
> vehicle tires on a dollar per mile basis.
> >>
> >> My German is rudimentary at best. Were these all tubed tires? And I assume that all tests were run with the same tubes?
> >
> > I don't know where it is now but the tests I read showed a rather startling advantage to the Vittoria Corsa G+. Almost half of what a Continental GP5000 was.
> >
> To me the most important factor is dollars per mile. I get 1200mi out of
> a Vittoria Zaffiro. Always waiting for a sale, I usually buy them under
> $20. So about $0.016/mile. That's for the rear tire, the front last much
> longer, about 4x.
>
> The 2nd important parameter is side wall quality. While I did milk
> 2500mi out of a Conti Gatorskin (alas, at $45 a pop) three out of four
> prematurely dropped out with side wall failure. One had less than 1000mi
> on it. That's when I gave up on them.
>
> --
> Regards, Joerg
>
> http://www.analogconsultants.com/

To me the least important part is price per km. The most important part is riding quality, after that flat resistance and durability. Replaced a 32 mm GP5000 after 5000 km and no flats on my gravel bike (road use). They cost here €40 for a 32 mm version. That is €0.008/km. Not that it matters but for that kind of money I am not going to ride shitty tires.

Lou

Frank Krygowski <frkrygow@sbcglobal.net> wrote:
> On 8/28/2021 2:55 AM, Lou Holtman wrote:
>> On Saturday, August 28, 2021 at 1:33:12 AM UTC+2, jbeattie wrote:
>>> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
>>>> sms <scharf...@geemail.com> writes:
>>>>
>>>>> I've moved to all Schwalbe, good to see how well the Pro One did.
>>>> Runner-up after the Conti 5000, IIRC.
>>>>
>>>> Axel
>>> BTW, this is the test:
>>> https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin ...
>
> Interesting. But ...
>
>> ... All the tests were performed with 137 gr Butyl tube (heavy), 5.5
>> bar, 35 km/hr and 85 kg weight.
>> Here are all results. The lower the number, the better the tire:
>>
>> https://photos.app.goo.gl/28KExMfx8jo6HdmJ6
>
> The 35 km/hr tells me it was a rotating drum test.
>
>
I’m far from convinced that for the end user that drum tests are useful in
any way.

Even with all the variables seeing how they perform on the road, either
with or without power meter. Is a more useful metric I have the added
handling being a gravel bike ie how much grip etc.

Roger Merriman

On 8/28/2021 5:45 PM, Joerg wrote:
> On 8/28/21 8:14 AM, Tom Kunich wrote:
>> On Friday, August 27, 2021 at 4:33:12 PM UTC-7, jbeattie wrote:
>>> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
>>>> sms <scharf...@geemail.com> writes:
>>>>
>>>>> I've moved to all Schwalbe, good to see how well the Pro One did.
>>>> Runner-up after the Conti 5000, IIRC.
>>>>
>>>> Axel
>>> BTW, this is the test:
>>> https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin
>>>
>>>
>>> Actually the Specialized Turbo cotton had lower RR than the Conti
>>> GP5000 on rough pavement and apparently a watt or so less on smooth
>>> pavement, but the winner over-all is the Schwalbe Pro One -- if you
>>> want a tire with good grip (which I do). But which Pro One? There are
>>> three of them -- tube, tubeless and TT.
>>> https://www.schwalbetires.com/bike_tires/racing_tires They're all
>>> wickedly expensive in the US.
>
>
> Bicycle tires in general are outlandishly pricey when compared to motor
> vehicle tires on a dollar per mile basis.
>
>
>>>
>>> My German is rudimentary at best. Were these all tubed tires? And I
>>> assume that all tests were run with the same tubes?
>>
>> I don't know where it is now but the tests I read showed a rather
>> startling advantage to the Vittoria Corsa G+. Almost half of what a
>> Continental GP5000 was.
>>
>
> To me the most important factor is dollars per mile. I get 1200mi out of
> a Vittoria Zaffiro. Always waiting for a sale, I usually buy them under
> $20. So about $0.016/mile.

I can't imagine worrying about the per-mile expense of bike equipment.

--
- Frank Krygowski

On Sat, 28 Aug 2021 22:22:35 -0400, Frank Krygowski
<frkrygow@sbcglobal.net> wrote:

>On 8/28/2021 5:45 PM, Joerg wrote:
>> On 8/28/21 8:14 AM, Tom Kunich wrote:
>>> On Friday, August 27, 2021 at 4:33:12 PM UTC-7, jbeattie wrote:
>>>> On Friday, August 27, 2021 at 1:27:20 PM UTC-7, Axel Reichert wrote:
>>>>> sms <scharf...@geemail.com> writes:
>>>>>
>>>>>> I've moved to all Schwalbe, good to see how well the Pro One did.
>>>>> Runner-up after the Conti 5000, IIRC.
>>>>>
>>>>> Axel
>>>> BTW, this is the test:
>>>> https://www.youtube.com/watch?v=SgOUsjzkT5I&ab_channel=TOURRennrad-Magazin
>>>>
>>>>
>>>> Actually the Specialized Turbo cotton had lower RR than the Conti
>>>> GP5000 on rough pavement and apparently a watt or so less on smooth
>>>> pavement, but the winner over-all is the Schwalbe Pro One -- if you
>>>> want a tire with good grip (which I do). But which Pro One? There are
>>>> three of them -- tube, tubeless and TT.
>>>> https://www.schwalbetires.com/bike_tires/racing_tires They're all
>>>> wickedly expensive in the US.
>>
>>
>> Bicycle tires in general are outlandishly pricey when compared to motor
>> vehicle tires on a dollar per mile basis.
>>
>>
>>>>
>>>> My German is rudimentary at best. Were these all tubed tires? And I
>>>> assume that all tests were run with the same tubes?
>>>
>>> I don't know where it is now but the tests I read showed a rather
>>> startling advantage to the Vittoria Corsa G+. Almost half of what a
>>> Continental GP5000 was.
>>>
>>
>> To me the most important factor is dollars per mile. I get 1200mi out of
>> a Vittoria Zaffiro. Always waiting for a sale, I usually buy them under
>> $20. So about $0.016/mile.
>
>I can't imagine worrying about the per-mile expense of bike equipment.

I can only imagine that after whacking out the $12,000 for the new
Mercedes bicycle one might be a bit short, thus the necessary
economizing on tires (:-)
--
Cheers,

John B.