I tried this mod not so long ago just to satisfy my curiosity. I put a nice thin layer of super glue on my tires and let it dry. When i tried the tires on my floor the grip was amazing.
By the way my stage 2 motor 9 teeth is super fast. I added an xmod ball bearing at the end of the motor. I took out the little metal bushing in back, drilled a hole thats a bit smaller than a ball bearing where the metal bushing was. Then i added tape around the motor shaft at the end enough to fit perfectly the ball bearings hole. then I closed the motor and the ball bearing went into the hole that I drilled replacing the metal bushing. Have fun.