depends on the track , something between 20 and 25
just try it out
i m running currently a 23 pinion on a mid size carpet track with a 7.5t
has big jumps and a big wallride.
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Associated B4 - Genius 90 - Vector x12 7,5t
Kyosho TF-5 DRIFT - Genius 90 - GM 13.5t blue
DX3R
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