Personally, I'd drop about 3 teeth for stock (30T) and start from there. I run a P2K2. The proper gearing may differ by 5 teeth or more depending on the motor, etc. Gear only for lap time. This is about the only thing that can bring all the variables together (after all whomever goes around the fastest wins). A 128T spur will also help lower the motor a little bit in the chassis. Good luck. Gearing questions are almost impossible to answer unless you are intimately familiar with all the variables.
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