This genuine Stomp 420 14T, hard-wearing sprocket is made of steel and will fit most Stomp pit bikes. A bigger front sprocket adds speed in each gear and more top speed but may reduce acceleration. More teeth on the rear will reduce top speed but will give faster acceleration. Suitable for almost all pit bikes, including Stomp, Demon X, Thumpstar, WPB and other minor brands. Before ordering please check shaft size.