elapid wrote:Is there something else that I am missing?
Archibald wrote:I've never really thought about it, but it's just a mind thing... road bike=23mm, my old hybrid=25mm.
having just done Paris-Roubaix on 28mm on the road bike I am wondering where to use the 28's again (other than for Flanders next year)... they were fine to ride on and I must admit I'm getting tired of the crap conditions of the roads here in London for commuting...
elapid wrote:I have always ridden 23mm tires except for a recent touring trip where I rode 25mm tires. But I am not sure why I, most cyclists I know, and professional cyclists ride on 23mm tires if the rolling resistance is less on 25mm tires.
stephens wrote:Who says there is less rolling resistance on 25mm tires? You may have read that test by fat tire makers but their caveat is "at the same tire pressure." Well, it is inappropriate to run 23 and 25 at the same psi so basically what they were saying is that if a 23 is underinflated it'll have the same rolling resistance as a 25mm. But when it's properly inflated, it'll have less of course (on smooth roads).
elapid wrote:So, to answer my own questions: narrower tires are used by most of us because the higher pressures reduce rolling resistance (and the rolling resistance comparison of different tire widths is essentially biased because they are tested at the same pressure rather than ideal pressures for each width of tire), and the weight savings and profile improve performance. However, wider tire widths provide a more comfortable ride and, as a result, may save energy.
Black Dog wrote:edited.... As for weight, especially rotational weight, this is another marketers brain wash. Saving 25-50 grams of tire weight does not really make the wheel harder to accelerate in any way that the human body could perceive. The claim of performance gains is simply unfounded, in that, the gain is so small as to be virtually insignificant. Final score: Marketing 1 million - Cyclists 0.
stephens wrote:I just don't see racers using anything but the best tires available to them. Can you think of any other sport where the participants use something that leaves them at a disadvantage just because of "marketing"?
analo69 wrote:Lots of pro riders use less than optimal equipment. Riders changing equipment due to sponsor changes, use equipment they don't like.
analo69 wrote: Matti Breschel got a knee injury because he used the specialized bike made especially for the Paris Roubaix instead of his normal bike.
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