Shimano Ultegra 9 speed cassette cs 6500 12 x 21

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Chrome-plated 9-speed cog cluster designed to match all shimano 9-speed components.
  • Hyperglide (HG) sprockets incorporate specifically positioned shift ramps and tooth profiles for improved chain control during shifting
  • Sprockets mount to the freewheel through a light alloy carrier that reduces weight and increases spocket stiffness for improved shifting
  • 12 x 21 ratio only available