Shimano

Shimano Ultegra CS-R8100 12-Speed Road Bike Cassette 11-34T HYPERGLIDE+ HG — Fits 11-Speed & 12-Speed Freehubs

Shimano Ultegra CS-R8100 is a genuine Shimano cassette delivering precise, reliable shifting for road bike riders.

Genuine Shimano Ultegra — brand new in retail packaging.

Will it fit? This is a 12-Speed 11-34T, HG 12-speed Freehub cassette. For the matching Shimano freehub — pair with a compatible 12-Speed chain.

Key Specifications

Brand Shimano
Series Shimano Ultegra CS-R8100
MPN CS-R8100
Type Cassette
Speeds 12-Speed
Key Spec 11-34T, HG 12-speed Freehub
Material Steel / aluminum
Weight 345 g (12.2 oz)
Color Silver
Country of Origin Japan
Condition Brand new — original Shimano retail packaging

Technology Highlights

  • ✓  HYPERGLIDE+ delivers fast, smooth, shockless shifting in both directions under load.
  • ✓  Wide-range gearing makes climbing easier and descents more confident.
  • ✓  Road 12-speed compatibility for current Ultegra and 105 groupsets.
  • ✓  Genuine Shimano quality — consistent performance and durability.

What's in the Box

  • 1 × Shimano Ultegra CS-R8100 cassette
  • Lockring & documentation (as supplied)
  • Original Shimano retail packaging
Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.
$89.99 USD
Regular price
$139.99 USD
Sale price
Unit price
per

Pay in 4 interest-free installments of $133.12 with

Shimano Ultegra CS-R8100 12-Speed Road Bike Cassette 11-34T HYPERGLIDE+ HG — Fits 11-Speed & 12-Speed Freehubs
$89.99 USD
Regular price
$139.99 USD
Sale price
Unit price
per

Shimano Ultegra CS-R8100 12-Speed Road Bike Cassette 11-34T HYPERGLIDE+ HG — Fits 11-Speed & 12-Speed Freehubs

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