Shimano Dura-Ace FC-R9100 Carbon Road Bike Crankset 172.5mm
Original price was: $624.99.$151.47Current price is: $151.47.
Description
Shimano Dura-Ace FC-R9100 Road Crankset
Engineered for elite road cyclists prioritizing precision and power transfer, this double-chainring system combines a 50/34T asymmetric tooth profile with Shimano’s proprietary Hollowtech II spindle interface to deliver optimized torque distribution across all cadence ranges.
Key Performance Features:
– 110mm BCD Compatibility: Seamlessly integrates with Shimano Ultegra/Dura-Ace components
– 130mm/135-142mm Hub Adaptability: Supports both traditional road frames and modern disc brake systems (chainstay length <415mm)
– 11-Speed Optimization: Precision-machined chainrings maintain consistent meshing with modern narrow-wide chains
– 172.5mm Crank Arm: Clinically proven length for endurance cyclists seeking balanced power output
Technical Advantages:
✓ 15% lighter than comparable alloy cranksets (verified by Shimano R&D)
✓ +/-0.1mm chainline accuracy ensures vibration-free shifting
✓ Corrosion-resistant black anodized finish withstands wet-weather training
Ideal Applications:
– Gran Fondo endurance events
– Time trial competitions
– All-weather training regimens
Competitive Comparison:
| Specification | Dura-Ace FC-R9100 | Leading Competitor |
|---|---|---|
| Weight (per crankset) | 780g | 825g |
| Bolt Circle Diameter | 110mm Shimano | 110mm Generic |
| Chainring Tension | +/-2% variation | +/-5% variation |
| Pedal Interface | 9/16″ standard | 3/8″ requires adapter |
This pro-grade component package includes both spider-mounted chainrings but requires separate installation of a compatible bottom bracket (sold separately). The asymmetrical tooth design reduces chain slap by 40% compared to symmetrical profiles during acceleration phases – critical for breakaway scenarios in criterium racing or mountain passes during stage races.
Built to UCI competition standards with a minimum 200-hour fatigue life certification under ISO 4210 testing protocols, this crankset delivers measurable performance gains over standard alloy components in controlled lab tests showing:
• 3% increased pedaling efficiency at threshold power zones
• 15% reduction in lateral chain deflection during hard sprints
• Superior heat dissipation during multi-hour rides in tropical climates
Perfect for category-1 road racers upgrading from triple-chainring systems or endurance athletes seeking lightweight durability for annual mileage exceeding 8,000km.
