Shimano Sora HG50 8 Speed Road Cassette

. HG Sprocket Design Computer designed HG HyperGlide sprockets insure fast and quiet down shifts as well as instant up shifts without hesitation. Features High quality 8 speed Road cassette Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadClose ratio gearing allows a more efficient use of energy through finer cadence controlSprockets are cut away to further reduce weight without reducing rigidityNickel plated finish offers hard wearing resistance to corrosionCorrosion resistant steel cassette lockringFor Narrow 8 speed HG chainsWeight 380g for 11 30T Available in the Following Ratios 12 21 12.13.14.15.16.17.19 2112 23 12.13.14.15.17.19.21 2312 25 12.13.15.17.19.21.23 2513 23 13.14.15.16.17.19.21 2313 26 13.14.15.17.19.21.23 26A 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.