I could tell the difference right away, and I can honestly say at first I was not too sure I felt comfortable peddling with it. It took a couple of rides to feel like I got my cadence back. But man can I climb way better. especially on those punchy steep hills. The first thing I noticed was at the top of the hill when you are about to crest over. I almost always never made it or I had to super push over that ridge. Not anymore. It just flows up and over and yes I do not spin out nearly as much. feels like you have traction control on