High Performance 10-Speed 105 Road Cassette Hyperglide Sprockets Have A Computer Designed Tooth Configuration With Contoured Shift Gates, Resulting In A Crisp Smooth Shift Even Under Load Close Ratio Gearing Allows A More Efficient Use Of Energy Through Finer Cadence Control Largest Sprockets Are Mounted On A Lightweight Alloy Carrier To Reduce Weight & Increase Rigidity Sprockets Are Cut Away & Drilled To Further Reduce Weight Without Reducing Rigidity Nickel-Plated Finish Offers Hard Wearing Resistance To Corrosion Pearl-Bright Steel Cassette Lockring For Super Narrow 10-Speed Hg Chains