20-30 is fast! I'm 1 down 10 up and have no problem keeping them under 10 mph. Could do it with less drastic gearing no prob though.
You got it!Originally posted by TommyV
I know that this is a newbie question PimP, but when you say one down, 10 up, do you mean your front sprocket is a tooth smaller, and your back sprocket is 10 bigger?