Quote:
Originally Posted by ripvanrando
It depends on speed and the road surface. On normal asphalt roads at higher speeds, the difference is massive. At 30 mph, I have measured a large difference between a 23 mm and 25 mm. Not miniscule at all.
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As I've said, I've found your experience compelling. But I am dubious of claims like this because the difference of 2mm is likely to be small. You say "measured", so is this based on times over a given course with both tires rather than a math model for power using rolling resistance and aero coeff?