SHIMANO 105 Cs-R7101 12-Speed Cassette Silver
- 12-speed, 11-34T range
- Built for the 105 Di2 drivetrain
- Silver finish
- 1.1 pounds, unisex adult
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A twelve speed cassette with a wide tooth range, built for the Shimano Di2 groupset named in the listing. Freehub details and individual cog sizes are missing, so check compatibility with your wheels.
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ASIN: B0CKXQTXF7Model: ICSR710112134Category: Cassettes & Freewheels
Overview
A cyclist can use this Shimano cassette to gain a wide gear spread, from the smallest cog to a large climbing cog. The description says it is made for a Di2 drivetrain and ties the range to faster climbing.
The wide range suits riders who want easier gears for climbs without leaving a close-ratio setup. The listing says little about cog steps, freehub fit or materials, so wheel and drivetrain compatibility need to be verified.
Who it's for
A rider with a matching twelve speed groupset who wants a wide-range cassette. Owners of older bikes with fewer gears, and anyone unsure about their wheel's freehub, should check before buying.
Pros and cons
- Wide gear range
- Twelve speed design
- Made for a Di2 drivetrain
- Freehub fit not stated
- Individual cog sizes missing
- Only fits twelve speed drivetrains
Performance notes
The large cog sets how easy the lowest gear is for climbing, while the small cog sets top speed. Smooth shifting depends on a matching twelve speed chain, shifters and derailleur, and a worn chain can ruin the result.
Specifications
| Model | ICSR710112134 |
|---|---|
| Dimensions & fit | |
| Product dimensions | 9 x 8 x 3 inches |
| Item weight | 1.1 pounds |
| Capacity & performance | |
| Speeds | 12-speed |
| Tooth range | 11-34T |
| Construction & materials | |
| Color | Silver |
| Compatibility & installation | |
| Drivetrain | Shimano 105 Di2 |
| Other details | |
| Department | Unisex-Adult |
| Model number | ICSR710112134 |
Closest rivals on specs
Shimano CS-M4100 Deore Cassette 10 Speed- Item Weight 1.1 vs 1 pounds (+10%)
SRAM Pg-1230 Nx Eagle 12-Speed Cassette- Item Weight 1.1 vs 1.32 pounds (-17%)
Shimano Unisex 305751220 Ultegra Cassette R8000 11V 11 V- Item Weight 1.1 vs 0.88 pounds (+25%)
Frequently asked questions
Does it work with an 11-speed drivetrain?
The listing says 12-speed and gives no backward compatibility, so assume it needs a matching 12-speed setup.
What cogs does it include?
The listing gives an 11-34T range but no individual cog sizes.