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The redesigned Shimano Ultegra CS-6700 10-speed road bike cassette offers a wider gear range that improves chain control and delivers quick, precise shifting action to your road bike. New aluminum carrier shaves 10g off the previous Shimano Ultegra road cassette for increased rigidity and improved power transfer. Redesigned Hyperglide (HG) sprockets incorporate specifically positioned shift ramps and tooth profiles for robust upshifts and downshifts. Nickel-plated steel cogs and aluminum lockring add durability.