Shimano Tourney TZ500 7 Speed CassetteSpecifically designed for use with 7 speed HG/UG chains, this versatile cassette offers quick and dependable operation. It features a rock-solid steel construction, which makes it perfect at handling all the knocks and bumps that are associated with long distance journeys. Whether you're using it on a mountain bike or road bike, this model's HyperGlide sprockets allow you to benefit from smooth and improved chain control during shifting. Features: Material: Steel Use: MTB, Road Speed: 7 speed Series: Tourney Tooth Combination: 14-16-18-20-22-24-34T Compatible Chain: HG/UG Tooth Count: Multiple options available to select Part Number: MFTZ5007434 Lightweight construction Easy assembly featureTechnologies: HyperGlide Sprockets: The distinctively designed HYPERGLIDE sprockets incorporate specially positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result. The HG cassette sprocket, which was developed for the MTB 7 speed system, underwent comprehensive optimization to achieve super-highly efficient shifting. HG sprockets: Guide the chain quickly and directly to the next sprocket without override. Conventional sprockets: Cause the chain to ride up and over the gear teeth before engaging the sprocket.A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.