Shimano Dura-Ace R9370 C99 Carbon Clincher Front Wheel Elevate your time trial and triathlon performance with the Shimano Dura-Ace R9370 C99 Carbon Clincher Front Wheel, the ultimate aerodynamic instrument built to slice through the air with unmatched speed. Co-designed alongside WorldTour athletes and elite triathletes, this high-performance road and time trial wheel represents the pinnacle of aerodynamic development. Featuring a deep 99mm rim profile with a wide 35.2mm external width, the WH-R9370-C99-F relies on advanced computational fluid dynamics and extensive wind tunnel validation to significantly reduce drag while maintaining stable handling under real-world riding conditions. Super Aero Engineering and Power Efficiency Built for pure speed, the 99mm deep-section rim works in harmony with 16 ultra-sleek Super Aero carbon spokes to eliminate drag and maximise forward momentum. Shimano has carefully engineered this front wheel to combine exceptional aerodynamic dominance with a subtle, tuned flex that keeps it remarkably fast and controllable when encountering crosswinds. Tipping the scales at an impressively light 792g for such a deep profile, this dedicated front wheel provides lightning-fast acceleration and relentless speed for solo breakaways, time trials, and triathlon legs. Elite Precision and Long-Term Durability At the heart of the wheel lies Shimano’s legendary cup and cone bearing system, allowing cyclists to fine-tune rotational torque for silky-smooth rolling performance under high loads. This updated hub architecture features replaceable bearing cups, improved waterproof sealing, and enhanced long-term durability to ensure consistent performance season after season. With its easily serviceable design and precise adjustment characteristics, the Dura-Ace C99 front wheel gives you the exact precision, reliability, and ultimate aero advantage needed to set your personal best.