Also changing the front (either up or down) one ring is approximately the same as 3 rings in the back. I mention this beacause before changing the rfont front you wwant to change the rear in an opposite fashion app 3 rings first. For example if you're going to make it easier to pedal by changing the front to a smaller ring, the change the back to a bigger ring followed immediately by changing the front. This takes a little (maybe a lot) of practice. It wil keep you from "spinning" or "mashing" when chainging gears. (Hope all that made sense.)