The Shimano MF-TZ500 6-Speed Freewheel Cassette is designed for both mountain and road cycling bikes. Made of a durable combination of aluminum and steel, this cassette/freewheel set includes a 14-tooth smallest sprocket and a 28-tooth largest sprocket, providing a versatile gear range for your cycling adventures. With a manufacturer warranty of 1 year and compatibility with Shimano MTB freehub/driver types, this high-quality product is a reliable choice for your sporting goods needs.