Motorcycle sprockets come in a variety of materials, color and designs. Popular materials include steel and aluminum. Performance enthusiast often opt for lightweight aluminum sprockets to reduce rotating mass on their drive train while sacrificing sprocket life. OEM sprockets are generally made from steel since steel sprocket provide the longest operating lifespan but they're heavy. Driven Racing and Supersprox have tried to close the gap by making lightened steel sprockets and even aluminum core sprockets with steel teeth. Driven provides a wide range of color sprocket applications that are available in black, blue, red and orange. When ordering, remember that both sprockets need to have the same pitch. For instance, only use a 520 front sprocket with a 520 rear sprocket and a 520 chain.