Originally Posted by
purpleturk
I bought a tc6 to race vta.I'm new to on road racing and I was wanting to get a FDR of 4. I was wonder what is a good spur and pinion combo to get.I didn't want to buy some that give you the right FDR and they not fit.Done that once not fun!
For even relatively small on-road tracks, you'll want to be between 3.5-3.7 FDR, depending on the timing your motor needs to run its best. I'd recommend a spur of between 86 and 92 teeth. Pinion sizes between 46 and 52 teeth.