Originally Posted by
Russ Roth
I'm guessing that it refers to the fact that if you have a 11-42 10sp vs an 11-42 12sp you have a better gear selection that will help you go faster for race purposes. Smaller jumps, more optimal gearing.
No. The gearing is too close on the high gears to make a difference.
2x and 3x drive trains have a LOT of gearing overlap, whereas 1x covers nearly the same useful range with the wide range cassettes. The lower gears and and simplicity of 1 x 12 are what it's about.