I put my LRP sxx comp v2 with a thunderpower 7.5 in it yesturday and ended up at 14/93 gearing and I was able to run for 25 min hard on the throttle with high bite track. I like this truck alot. eventually I want to get a 550 motor but right now the funds don't permit me to just wish I had more bottom end but oh well still running fast laps. And I had to run it with the clicker open otherwise it would heat up quicker due to more brake. Other then that with the 48pitch you have to be super detailed and make sure your mesh is perfect or you will eat up that spur gear, already toasted one.