One Up 11 Speed Sprocket Kit

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sku: GM091720-48

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One Up 11 Speed Sprocket Kit


Why bother when Shimano make an 11-46T cassette? The 11-46T has a huge, clunky 9T jump from 37-46T meaning that the shift to the biggest sprocket feels like a shifting into a granny ring.

Adding a OneUp 47T sprocket to the Shimano 11-42T cassette gives you 5T jumps in the bigger sprockets - 37-42-47T - making the lower gears extremely useable. The 47T requires no derailleur cage mODIfications, so its a quick and easy install.


  • 18T sprocket provides more even cassette progression for smoother cadence and improved shifting
  • Maintains the 42T as the smallest alloy sprocket preventing premature drivetrain wear. No major drivetrain manufacturer goes smaller than 40T in alloy.
  • Compatible with M8000/M7000 GS (med cage) and SGS (long cage) derailleurs
  • Uses standard freehub driver bodies (Not XD)
  • 10 upshift points
  • Patented (US 9,011,282)
  • Cassette progression: 11-13-15-18-21-24-28-32-37-42-47 (11-4)
  • Sprocket material: 7075-T6 Aluminum (47T), Nickel plated hardened steel (18T)
  • Sprocket weight: 68g more than stock 11-42 cassette
  • Compatibility: For SLX/XT M7000/M8000 11-42T cassettes. 11 Speed only. Standard freehub driver.
  • Cassette range improvement: 12%
  • Color: Grey