Changed out the stock spur to see if we gain any more with a 22 tooth pinion. Not sure yet if the 57 helps or hinders it. Maybe if I had a bigger pinion that 57 would benefit. We only gained 2-3mph.Still need to do more testing. Also added the vitavon bell crank that I took off mojave grom due to binding with arms.so far the steering is holding up but these groms have a major weak point in the steering. Please like and subscribe! #losinascar #vitavon #hotracing #rccar