High quality Competition Grade spur & motor gears from Yeah Racing! Our Spur Gears is made by High Precision injected Delrin that ensures exact Concentric production and consistent teeth to give you pro-longed use, high efficiency and low-noise operation! YR Motor gears is a great replacement parts to the original motor gear or pinions for Tamiya, Traxxas, Xray, Yokomo, Kyosho & other big brand RC car, which is made of durable 7075 aluminum & other materials