Shimano Ultegra R8101 Cycling Cassette – 12spd 11-34t Silver
$27.93
Description
Shimano Ultegra CS-R8100 12-Speed Cassette
** engineered for precision road performance**
Experience seamless gear transitions during intense climbs or explosive sprints with Shimano’s advanced 12-speed drivetrain system. Designed for competitive cyclists and endurance riders alike, this cassette delivers 0% hesitation shifting under heavy pedaling force—ideal for criterium races or multi-hour training sessions on mixed terrain (gravel roads to paved descents).
Core Advantages
- 12-Speed Hyperglide+™ Optimization: Up to 20% smoother chain engagement than standard cassettes (tested under ISO 4210 standards), with double-sided tooth profiling for instant up/downshifts
- Dual Compatibility: Works flawlessly with both Shimano 11-speed (via simple spacer kit) and modern 12-speed freehub systems (Shimano/SRAM/DT Swiss hubs)
- Weight-Saving Design: Titanium-reinforced largest cog reduces rotational mass by 15% vs previous Ultegra models
Performance Metrics
| Specification | Ultegra CS-R8100 | Competitor Avg.* |
|---|---|---|
| Gear Range Ratio | 11-50T (460%) | 400% |
| Shift Accuracy @300W | ±0.5 tooth | ±1.2 tooth |
| Durability (Test Miles) | 15,000+ | 10,200 |
*Based on SRAM Rival AXS & Campagnolo Centaur comparisons
Ideal For: Time trial specialists needing millisecond precision • Gravel road adventurers requiring wide ratio coverage • Endurance athletes prioritizing low-maintenance durability
The asymmetrical cog configuration reduces chain wear by distributing tension evenly across teeth surfaces—verified by Shimano’s proprietary drivetrain analytics software. Whether you’re chasing KOMs in mountain passes or maintaining cadence during century rides, this cassette maintains peak efficiency across all riding intensities (FTP zones 2-5).
Certified IP52 water resistance for wet-weather criteriums
