3945X 15T Pinion Gear 15-T pinion (32-p) (fits 3mm shaft) TRX3945X3945X 15T Pinion Gear 15-T pinion (32-p) (fits 3mm shaft) TRX3945XGear, 15-T pinion (32-p), heavy duty (machined, hardened steel) (fits 3mm shaft)/ set screwTraxxas pinion gears let you fine-tune the performance of your Traxxas model. Changing gear ratios can help balance acceleration and top speed for different running conditions. Please consult your owner’s manual for more information on recommended gearing options for your specific model.
