Originally Posted by
Random11
The difference is 5%. If she kept the same cadence and was going 15 mph with the 40T, she'd go 15.75 mph with the 42T.
I just want to point out that on this bike with 38mm tires, 15mph in the 40x11 would only be 48rpm cadence.
I don't think taller gears are the answer if 15mph is the top speed we're talking about.