Shimano Ultegra CS-R8101 Cassette - 12-Speed | 11-30t

Shimano Ultegra CS-R8101 Cassette - 12-Speed | 11-30t Shimano

Shimano Ultegra CS-R8101 Cassette - 12-Speed | 11-30t

Shimano Ultegra CS-R8101 Cassette - 12-Speed | 11-30t

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Why Is the Shimano Ultegra CS-R8101 the Go-To 12-Speed Cassette for Serious Road Riders?

The Shimano Ultegra CS-R8101 brings HYPERGLIDE+ technology to Ultegra-level riders, enabling uninterrupted shifting under full pedaling load whether climbing, sprinting, or accelerating out of corners. Larger driving cogs maximize drivetrain efficiency and the cassette is compatible with both Shimano 11-speed and 12-speed freehub bodies, making it a clean upgrade path for riders on existing wheelsets. The 11-30T range is optimized for flatter terrain and racing scenarios where a tighter gear progression delivers better cadence management.

Compatible with Shimano Ultegra R8100 and R8150 12-speed drivetrains. Also compatible with existing Shimano 11-speed freehub bodies. Requires a 12-speed chain.

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$115.99
$115.99 $130.00
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  • Estimated delivery: Aug 20 - Aug 24

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Specifications

  • Model: CS-R8101
  • Speed: 12-speed
  • Range: 11-30T
  • System: HYPERGLIDE+
  • Freehub compatibility: Shimano 11-speed and 12-speed freehub bodies
  • Groupset match: Ultegra R8100 / R8150

FAQ

Who should choose the 11-30T over the 11-34T?

The 11-30T suits flat to rolling terrain and racing scenarios where closely spaced gear steps improve cadence control. Choose 11-34T if you ride significant climbs or highly varied terrain.

Can the CS-R8101 be used with my existing 11-speed wheelset?

Yes. The CS-R8101 is compatible with standard Shimano 11-speed freehub bodies, so upgrading to Ultegra 12-speed does not require new wheels.

What chain should I use with the CS-R8101?

Use a Shimano 12-speed chain. Shimano uses the same chain platform across both Dura-Ace R9200 and Ultegra R8100 road drivetrains.

Best For

Road racers and performance riders on Shimano Ultegra R8100 or R8150 who ride flat to rolling courses and want tight gear steps with HYPERGLIDE+ under-load shifting.

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