I finally upgraded to it from a 44. It doesn't accelerate or climb hills as well, but its worth it. I weigh 270 lbs. My moondog just hit 35 mph according to my speedometer. I am not sure how accurate it is, but it feels about right to me. That was a blast!! :grin: You guys that are running 32 - 36T sprockets on 26" wheels are nuts! The 40T is fast enough!