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metal clamp jaw backing plates and replaceable rubber jaw covers
Fits Dura-Ace ST-R9120 levers
Bearings can be serviced with the Chris King Grease injector tool
(mm) 26 Manufacturer Number 6803 Material Stainless Steel Thickness 5
Shimano Ultegra CS-R8101 Cassette - 12-Speed, 11-34t, Silver seatpost-clamp metal clamp jaw backing platesThe uninterrupted shifting experience of the Shimano Ultegra CS R8100 12 speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12 speed freehub bodies. Shimano HYPERGLIDE+ technology is integrated to provide seamless shifts both up and down the gear range. Refined 12 step gear combination provides