Product details:

FEATURES of the Shimano Ultegra CS-R8100 12-Speed Cassette

• Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation
• Faster, smoother shifts under maximum pedaling force
• Compatible with new 12-speed and road 11-speed FREEHUB body

Brand:Shimano
Manufacturer Part Number:ICSR810012134
Manufacturer:Shimano
Assembled Product Weight:1.1000 oz
Assembled Product Dimensions (L x W x H):7.55 x 7.91 x 2.75 Inches