Quote:
Originally Posted by spoonrobot
Results from the Laboratory of the Road
Pavement:
19mm tires are slower than 21mm tires are slower than 23mm tires, many of which are slower than some 25mm tires, many 25mm tires are faster than 28mm tires, most 28mm tires are faster than 32mm tires, 32mm tires are faster than 35mm tires, 35mm tires are faster than 38mm tires, etc.
Gravel:
33mm tires are slower than 35mm tires are slower than 38mm tires, many of which are slower than some 40mm tires, many 40mm tires are faster than 42mm tires, most 42mm tires are faster than 45mm tires, 45mm tires are faster than 48mm tires, 48mm tires are faster than 52mm tires, etc.
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You're missing the air quotes around "Laboratory of the Road"
Not sure what to make of terms such as "many" and "most" tires. Why not compare tires using the same, or at least similar construction? Also, if speed were not simply a decreasing function of width, as you are suggesting, it would be very surprising if global max of 25mm for speed were independent of rider weight.
In fact I find detailed anecdotal accounts, such are ripvanrando's, more compelling than these "why arent the pros riding them" type arguments.