The SunRace RX-1 11-Speed 11-28 Tooth Metallic Silver Road Bike Cassette Sprocket is a high-quality steel cassette designed for road bikes. With a sleek silver color and a durable construction, this cassette is compatible with both SRAM and Shimano road bike hubs. The 11-speed design, ranging from 11 to 28 teeth, ensures smooth and efficient gear shifting for optimal performance on the road. The set includes a cassette/freewheel, making it a convenient and reliable choice for cyclists looking to upgrade or repair their road bike.