50T + 18T SHARK Sprocket and Cage [ 1x11 ]

OneUp your Shimano 11 speed drivetrain with the Shark 50T Sprocket for SLX/XT 11-42 Cassettes.

Only compatible with Shimano 11-42T (M7000/M8000) cassettes. For 11-40T cassettes see OneUp 45T Sprocket. Not compatible with SRAM drivetrains.

OneUp Components Shark 50T Sprocket and Cage is part of the widest 11-speed 1X system ever created. A climb crushing, descent hammering, 500% of range.

The 50T upgrade increases the stock Shimano 11 speed 11-42 cassette range by 19%. The 50T provides more total cassette range, not just an easier granny gear. Adding the OneUp 50T sprocket lets you increase your 1x11 front chainring from a 30 to 34T without losing any low range.

Kit contains: 50T, 18T and Shark Cage 

  • 18T sprocket provides more even cassette progression for smoother cadence and improved shifting
  • Shark Cage is compatible with M9000/M8000M7000 GS and SGS derailleurs and offers 50% more pulley offset than stock
  • Uses standard freehub driver bodies (Not XD) 
  • 8 upshift points
  • Maintains the 42T as the smallest alloy sprocket preventing premature drivetrain wear. No major drivetrain manufacturer goes smaller than 40T in alloy.
  • Patented (US 9,011,282)

Ride faster, higher and longer with a wider range cassette.


Cassette progression: 11-13-15-18-21-24-28-32-37-42-50 

Sprocket Material: 7075-T6 Aluminum (50T and Cage), Nickel plated hardened steel (18T)

Weight: Cassette upgrade 80g, RD upgrade 9g 

Compatibility: SLX/XT M7000/M8000 11-42T cassettes (For Shimano 11-40 use the OneUp 45T sprocket), Cage compatible with M9000/M8000/M7000 derailleurs (GS & SGS) *Not compatible with Shimano 11-46 cassettes*

*NOTE: installation may require new chain length (Chain Length Calculator Chart -Here)

*NOTE: not compatible with e-13 wide flange hubs (LG1+ and TRS+)

Cassette range improvement:  19%

Color: Green, Grey (Matched to XTR)



Mount the OneUp 50T first and reinstall all sprockets except the stock 17T and 19T sprockets (these are replaced with our 18T). Checkout the install video for full details on Shark Cage installation.

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