[simplechamp]

If you already have the 2200kv motor and still need to buy lipos I'd go with 5S. You can use a larger pinion then (and depending on the motor mount used you might not be able to use 10T pinion, I know the smallest I can use on my truggy is 13T, and that is with a 52T spur) and can still gear for 40mph and have a well rounded system with balanced low-end torque and top speed. 5S will also bring the RPM down to about 40k which is more reasonable and will be less hard on the motor, and your rollout ratio will still be well within the acceptable range. Overall, the 2200kv on 5S would make for a great bashing setup.