Is the bmax fitted with the kit standard pinion & what motor did you have in the car before last night?
As a rule of thumb see the reply above from slowone..
Broadly, and I am sure I might get hammered here, there is a difference in gearing for brushed and brushless motors, however for the same "turn" motor using a smaller than standard pinion the car will accelerate faster but will have less top speed.. fitting a larger than standard pinion the car will accelerate slower but will have a higher top speed...
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