What gearing for an e-maxx?

Same gearing
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9xl geared to 39mph 66/20 with stock tires/// 44mph on 40 mashers

9xl geared to 42mph 66/22 with stock tires/// 48mph on 40 mashers

9xl geared to 43mph 64/22 with stock tires/// 50mph on 40 mashers

8xl geared to 47mph 66/22 (or was it 64?) But said overheating may result and it also said too much votage on 14 cells?


So will the 9xl get to hot? Theres some hot days in texas! Im tired of taking brakes every 5 mins.

Cause if it dosent get to hot it looks like Im going with the 9xl!