Wheel hubs, splined, 17mm (red-anodized) (4)/ wheel nuts, splined, 17mm (red-anodized) (4)/ screw pins, 4x13mm (with thread lock) (4) 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.