Primary Drive Rear Steel Sprockets are made to meet or exceed O.E.M. specifications. Made of high-grade hardened steel, these sprockets are made to be durable and offer long wear. Lightening holes add to the aesthetic appeal while reducing weight. Primary Drive Rear Steel Sprockets are manufactured with precision for a perfect fit. Whether you ride a motorcycle or ATV, Primary Drive is sure to offer the best value in sprockets. Durable replacement steel rear sprocket for motorcycles and ATV's. Designed to O.E.M. specs using a high-grade hardened steel. Manufactured with precision for a perfect fit.