Shimano 105 R7100 ULTEGRA R8100 Cassette 12s Bike Cassette For Road Bike Di2 Groupset 11-30T/11-34T Original Shimano Bike Part
You will be redirected to AliExpress to complete your purchase
Specifications
- Brand Name
- SHIMANO
- High-concerned chemical
- None
- Origin
- Jp(origin)
- Material
- Alloy
- Model Number
- R8100/R7100
- is_customized
- No
- Freewheel Speed
- 10
- Gear Teeth
- 28 - 34 T
- Components
- Freewheel
Product Description
Shimano 105 R7100 ULTEGRA R8100 Cassette 12s Bike Cassette For Road Bike Di2 Groupset 11-30T/11-34T Original Shimano Bike Part
Model CS-R8100-12
Series ULTEGRA R8100
Average weight 291 (11-30T) 345 (11-34T)
Type HYPERGLIDE+
Rear transmission 12
Compatible chain HG 12 speed
Combination name (group name) 11-30T 11-34T
Combination | 1 11-12-13-14-15-16-17-19-21-24-27-30T | 11-12-13-14-15-17-19-21-24-27-3034T
Spline type|HG spline L2 (ROAD 12-speed dedicated) ✔
Model CS-R7100-12
Series SHIMANO 105 R7100 Di2 series
Type HG
Rear transmission 12
Compatible chain HG 12 speed
Combination name (group name) 11-34T
Combination | 1 11-12-13-14-15-17-19-21-24-27-30-34T
Pros & Cons
Pros
- Genuine original Shimano parts for reliable performance
- Two popular gear ratio options for different riding needs
- HYPERGLIDE+ rear transmission for smooth, quick shifting
- Compatible with 12-speed HG chains for Di2 road groupsets
Cons
- Heavier 345g weight for the 11-34T variant
- Only compatible with Shimano 12-speed Di2 road drivetrains
- No included installation hardware or instructions
- Higher price point compared to third-party aftermarket cassettes
Common Questions
What material is this bike cassette made from?
This bike cassette is constructed from alloy material.
What gear ratios and speeds does this cassette support?
It is a 12-speed road bike cassette available in 11-30T and 11-34T gear set options.
What type of bikes is this cassette compatible with?
It is designed for road bikes and compatible with Shimano Di2 12-speed groupsets.
Is this an original Shimano bike part?
Yes, this is a genuine original Shimano bike part.
Where does this item ship from?
This item originates from Japan as noted in the product specifications.
Product information last updated on March 6, 2026