Inferno ST-RR Gearing Question

[simplechamp]

I would start out with the 52/13 and go from there. Run it and watch temps closely, and you can decide how you like the torque and top speed, and also decide if the temps are reasonable. I can say with a 1.06:1 rollout ratio you will have plenty of torque.

As for the spur gears, I personally have never had an issue with steel and choose to use those, but some people do prefer plastic, it's a personal preference you can experiment with.