Shimano Ultegra CS-R8100 12-Speed Road Bike Cassette 11-34T HYPERGLIDE+ HG — Fit
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.
