>I find the theory that there's no downside to too-short cranks absurd. Imagine trying to pedal a
>bike with ridiculously tiny cranks, say 60mm long. Oh yeah, that'll be very enjoyable, wouldn't it.
Yeah, and 400 mm cranks would be quite a change as well! But the difference between 170s and 175s is
small, so either way, most people can accomodate easily.
>Don't forget the difference of the circle diameter created by 175mm cranks as opposed to 170's is
>10mm and not 5mm.
This means that out a 340mm circle, you have 10 mm increase in diameter, or about .4 inches in
13.4 inches.
Might need one to change the seat height a tad.
I ride 170s, 172.5s and 175s, I believe that I can notice a difference between the 170s and 175s but
it is only to notice it.
As long as the cranks are not too long, there seems to be little difference in performance.
jon