Traxxas 3943X Pinion Gear 13T-32P Hardened SteelGear, 13 T pinion (32 p), heavy duty (machined, hardened steel) set screw For some drivers, heavy duty just wont cut it. When you drive on the ragged edge, you need parts that can withstand the brutal punishment that LiPo power can dish out. If full throttle is the only language you know, Traxxas introduces a new line of pinion gears just for you. These gears come machined out of hardened steel in large 32 pitch format for your most hardcore bashing