On 01/04/2014 04:17 PM, Patrick Moore wrote:
Also, has he or anyone else determined that a 23 mm Pro Race 3 is slower than a 25 mm on a very smooth road?
He has tested the Pro2Race in all 3 sizes and found that; and as I recall, he quoted Michelin in the article as saying the same thing.
A 19mm?
In BQ's test the 25 was faster than the 23 which in turn was faster than the 21. They didn't test a 19mm.
On glass?
I'm tempted to say something like "On glass, all 3 sizes go PSSSTTTT equally" but otherwise, who rides much on glass-smooth surfaces?
In brief, is there a breadth below which an otherwise identical tire is always slower even on the best of surfaces? On the other hand, is there a point where, even on rough surfaces, a wider tire is not faster than a narrower one? 60 mm? 70 mm? 100 mm?
"All this data shows that 31 mm tires roll as fast as 25 mm tires, even on very smooth roads. And when the roads get rougher, the wider tires roll faster. What about even wider tires? Our on-the-road experience suggests that even 42 mm-wide tires do not roll slower than 25 mm tires (above), but without rigorous testing under controlled conditions, we can not say for sure. We hope to test this soon."
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