Cannondaleriders

Im sure this has been answerd some where, but what is a good set up for sprockets on a stock motor with 18"s and sometimes 20"s, i just changed to a 14 on the front and have 42 on back, think going to a 40 on the back is enough for the 18"s and still be ok for the 20"s power wise? or maybe a 38 and switch out to the 42 when i put 20"s on? Thanks

I liked 14-40,39 for the 18's alot.It will pull 20's with that gearing but 5th will be a little slow to rev out.Some 20's are way smaller than others though so you will have to experiment.

Thanks, i think i will try the 39 out and see were that gets me.