>>1241988Form Tom Anhalt’s blog:
“Specialized S-Works Turbo 22C = .0041, 38W for pair @ 40kph
Specialized S-Works Turbo 24C = .0036, 33W for pair @ 40kph
Specialized S-Works Turbo 26C = .0035, 32W for pair @ 40kph
Specialized S-Works Turbo 28C = .0035, 32W for pair @ 40kph (note: AC101 disc wheel)
Specialized Turbo Cotton 24C = .0029, 27W for pair @ 40kph
Specialized Turbo Cotton 26C = .0028, 26W for pair @ 40kph”
Here he’s tested a bunch of tires from the same manufacturer. The 22c Turbo, the only one that would conform to the 105% rule on rims up to 25mm wide (due to clincher tires running wider on wider rims), generates significantly more rolling resistance.
This chart shows the Crr combined with the CdA on the same aero wheels, the narrowest tires are notably the slowest.
