SHIMANO Ultegra R8101 Cassette - 12-Speed - 11-34t Sunshine_Enriched the center knobs are heavily

the center knobs are heavily ramped on the leading edge to reduce rolling resistance

The open design similar to our X-DOME™ cassette aids in mud clearance

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Judy Silver features the Motion Control RL damper and is compatible with OneLoc remotes and has Fast Black upper tubes for an all-black look and low friction performance

The Pure Contact tire was created for urban riders who want confidence to commute

SHIMANO Ultegra R8101 Cassette - 12-Speed - 11-34t Sunshine_Enriched the center knobs are heavilyThe 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