A high quality tough and durable freewheel from Shimano - Screws on to standard multi-speed rear hubs - 14 - 28 tooth range - Indexed teeth work smoothly with Shimano and other brand derailleurs - An excellent replacement freewheel to make your bike more efficient and smoother to ride - Ensures smooth shifting up and down the gears - Simply screws into hub (Tool required to remove) + QUALITY KMC CHAIN.