Who follows the 1" per rev. gearing rule (rollout ratio)?

[simplechamp]

Speedy: I think experimenting is good. But for me (and many others) it's not feasible to go out and buy every pinion and every spur for a vehicle just to experiment. Calculating a rollout of 1 will give you an appropriate starting point, and from there you can buy just a couple pinions and spurs to fine tune the rollout/gearing to where you want it.

BrianG: Yes, you want your tire circumference and final drive ratio to be equal (at least to start). I was going to suggest you may want to add it to the calc. All it requires is one more division as I previously mentioned, and I think it's helpful to find a good, reasonable starting point to fine tune your gearing. You need more torque? maybe try it at .8 or .9 Feeling the need for speed? go up to 1.3, (just examples, not exactly sure what are reasonable min and max points yet)