Traxxas 5640 14-T Hardened Steel Pinion Gear for 5mm Shaft, 32P Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings. Fits 5mm motor shafts Includes set screw; one gear per package Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles! This product is made from high quality materials, and designed for lasting performance. This is replacement hardware for use on Traxxas vehicles, consult your user's manual for exact parts listings.