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Shimano
SHIMANO Ultegra CS-R8101 / CS-R8100 12-Speed Road Cassette (11-34T) - OEM Bulk
SHIMANO Ultegra CS-R8101 / CS-R8100 12-Speed Road Cassette (11-34T) - OEM Bulk
Regular price
$82.99 USD
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$82.99 USD
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SHIMANO ULTEGRA CS-R8101 12-SPEED ROAD CASSETTE
HYPERGLIDE+ TECHNOLOGY — ALUMINUM CARRIERS — 11-34T RANGE
Experience race-proven performance with the genuine Shimano Ultegra CS-R8101-12 / CS-R8100 12-Speed Cassette. Engineered for the demands of competitive road cycling and fast-paced gravel riding, this cassette features HYPERGLIDE+ technology for instantaneous, silent shifting under load. The 11-34T configuration offers a wide gear range for versatile terrain, while the lightweight aluminum sprocket carriers reduce rotational weight compared to the 105 series. This OEM Bulk version ensures professional quality at a competitive price.
FEATURES
- Instant Hyperglide+ Shifting: Precision-shaped tooth profiles and shift ramps allow you to shift up and down the cassette seamlessly without easing off pedal pressure, maintaining momentum during attacks and climbs.
- Lightweight Aluminum Construction: The largest cogs are mounted on rigid, anodized aluminum carriers (spiders), significantly reducing weight and increasing torsional stiffness for efficient power transfer compared to steel carriers.
- Standard Freehub Compatibility: Unlike 12-speed MTB cassettes, this road cassette fits perfectly onto existing standard 11-speed Shimano/SRAM road HG freehub bodies, making upgrades simple and cost-effective.
- 11-34T Versatile Range: Gear combination: 11-12-13-14-15-17-19-21-24-27-30-34T. The 34T low gear provides a 1:1 ratio (with a 34T chainring) for conquering steep gradients comfortably.
- Durable Finish: Nickel-plated steel cogs offer excellent corrosion resistance and long-lasting durability against wear.
- Drivetrain Compatibility: Designed for Shimano 12-speed road systems (Ultegra R8100/R8150, Dura-Ace R9200/R9250) and fully compatible with 105 12-speed groupsets.
- Brand: SHIMANO
- Series: Shimano Ultegra R8100 Series
- Model: CS-R8101-12 / CS-R8100-12
- Speed: 12-Speed
- Gear Combination: 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+
- Material: Nickel-Plated Steel Cogs with Anodized Aluminum Spider & Lockring
- Average Weight: Approx. 345g
- Condition: 100% Authentic Brand New
- Packaging: OEM Bulk (Protective Polybag)
Q: What is the difference between CS-R8100 and CS-R8101?
A: CS-R8101-12 is the updated revision of the CS-R8100-12. Both share identical 11-34T gear ratios, Hyperglide+ technology, aluminum carriers, and weight specifications.
Q: Will this fit my old 11-speed road wheels?
A: Yes! Shimano 12-speed road cassettes are designed to fit standard 11-speed Shimano/SRAM road HG freehub bodies without modification.
Q: Is this compatible with 105 Di2 R7150?
A: Yes, this Ultegra cassette is fully compatible with the Shimano 105 12-speed Di2 groupset.
- Processing Time: Ships within 24–48 hours from our US warehouse.
- Delivery Time: Standard shipping usually arrives within 3–7 business days across the US mainland.
- Tracking: Tracking information will be emailed immediately once your package is dispatched.
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