Actually, I can't remember exactly but at 3000 rpm I used to be doing 50 and now it's 57. At 4000 it's about 10 mph faster (about 78). I probably should have made a chart before, but didn't think about it. The one tooth made a really noticable difference - I think I'm gonna like it.
I got my 18T from BellaCorse.com and it was 24.94 including shipping and handling.
