Shimano Ultegra 9 speed cassette cs 6500 12 x 21
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