SHIMANO 105 CS-R7101 / CS-R7100 12-Speed Road Cassette (11-34T) - OEM Bulk

Experience seamless, high-performance 12-speed road shifting with the genuine Shimano 105 CS-R7101-12 / CS-R7100 12-Speed Cassette. Featuring Shimano's proven HYPERGLIDE+ technology and a versatile 11-34T wide gear range, this cassette delivers ultra-smooth gear changes under heavy pedaling loads, making steep climbs easier and flat high-speed efforts more efficient.

Key Specifications

• Brand: SHIMANO
• Series: Shimano 105 R7100 Series
• Model Options: CS-R7101-12 / CS-R7100-12
• Speed: 12-Speed
• Gear Combination (11-34T): 11-12-13-14-15-17-19-21-24-27-30-34T
• Freehub Compatibility: Fits standard Shimano/SRAM 11-Speed Road HG freehub bodies AND Shimano 12-Speed Road freehubs
• Technology: HYPERGLIDE+ (Precision ramped cogs for smooth up & down shifting)
• Material: Nickel-Plated Steel Cogs with Anodized Aluminum Spider & Lockring
• Average Weight: Approx. 361g
• Condition: 100% Authentic Brand New
• Packaging: OEM Bulk (Protective Polybag)

Why Choose Shimano 105 CS-R7101 / CS-R7100?

1. Advanced HYPERGLIDE+ Shifting

Precision-engineered tooth profiles and shift ramps allow continuous, crisp gear changes up and down the cassette without lifting off the pedals, ensuring uninterrupted power transfer during sprints and climbs.

2. 11-34T Wide Climbing Range

The 34T low gear provides a generous 1:1 gear ratio when paired with a standard 34T inner chainring, allowing you to conquer steep mountain passes while maintaining a smooth pedaling cadence.

3. Broad Freehub & Wheelset Compatibility

Unlike 12-speed mountain bike cassettes that require dedicated freehubs, this road 12-speed cassette mounts onto existing standard 11-speed Shimano/SRAM road HG freehub bodies—making upgrading your wheelset easy and affordable.

Compatibility & Technical Notes

• Drivetrain Fitment: Compatible with all Shimano 12-speed road drivetrains (105 Di2 R7150, 105 Mechanical R7100, Ultegra Di2 R8150, and Dura-Ace Di2 R9250).
• Chain Compatibility: Requires a Shimano 12-speed HG road/MTB chain (e.g., CN-M6100, CN-M7100, CN-M8100, CN-M9100).
• Freehub Note: Fits standard 11-speed road HG spline freehub bodies (no special 12-speed micro-spline tool required).

Frequently Asked Questions (FAQ)

Q: Will this 12-speed cassette fit on my current 11-speed road wheels?
A: Yes! Shimano 12-speed road cassettes are designed with a recessed spider that fits directly onto standard 11-speed Shimano/SRAM road HG freehub bodies.

Q: What is the difference between CS-R7100 and CS-R7101?
A: CS-R7101-12 is Shimano's updated revision of the CS-R7100-12. Both feature identical 11-34T gear ratios, HYPERGLIDE+ technology, and full 12-speed compatibility.

Q: Is this authentic Shimano?
A: Yes, 100% genuine Shimano factory components sourced directly through authorized OEM channels.

Q: Fast Domestic Shipping?
A: Yes, all orders ship directly from our US warehouse for quick delivery.