Shimano Dura-ace Wh-r9370-c50-tl Cl Disc Tubeless Road Rear Wheel. Dominate with the SHIMANO Dura-Ace WH-R9370-C50-TL, a tubeless disc rear wheel engineered for peak racing performance. Its all-round design prioritizes lightweight, stiffness, and aerodynamics, boasting significant weight savings thanks to carbon spokes, a revised rim layup, and hub. Experience sharper response on climbs, stable handling in sprints, and sustained speed with its aerodynamically optimized rim profile. Designed for 28-30C tires, this wheel offers exceptional power transfer and dependability at pro-level speeds. Be versatile. Dominate. The DURA-ACE WH-R9370-C50-TL is an all-round racing wheelset refined for lightweight performance, stiffness, and aerodynamics at RACE speeds. From the earliest design stages, testing by world-class riders informed development to pursue the optimal balance of low weight, rigidity, and aero efficiency. In addition to carbon spokes, a thoroughly revised rim layup and hub architecture deliver significant weight savings, achieving 1,302 g per pair (159 g lighter than the previous WH-R9270-C50 model) for sharper response on climbs and during acceleration. This design maintains dependable rigidity at pro-level speeds, providing stable behavior in sprints and high-speed cornering. The new rim profile delivers high aerodynamic efficiency, helping sustain speed across a broad range of conditions.Features:- Designed with 28-30C tires in mind: 23 mm internal rim width lowers rolling resistance and preserves tire stiffness- Aerodynamically optimized rim: Over 5.4 million shape simulations achieved a 6% aero improvement compared to the previous model- Carbon spokes: Carbon spokes are optimized to balance low system weight with stiffness- Spoke pattern - Front 21 / Rear 21: Combined with mixed-diameter carbon spokes to achieve low weight and stiffness for all-round use- Hooked tubeless rim: Supports a broad range of tire compatibility- Cup & Cone bearings: Excellent serviceability and precise adjustment deliver both speed and durability- Rear wheel - Direct Engagement: Superior drive stiffness for maximum power transferSpecifications: - Front/Rear: Rear- Brake type: Center Lock disc brake- Rear speeds: 12- O.L.D. (mm): 142- Wheel size: 622 x 23TC (700C)Tire:- Type: Tubeless- Recommended size: 28-622 - 45-622Rim:- Height (mm): 50- Internal width (mm): 23- External width (mm): 32- Requires rim tape: YesSpokes:- Number: 21- Diameter (mm): 2- Axle fixing method: E-THRUSpline type:- HG spline L2 (ROAD 12-speed dedicated): Yes- Engagement type: Direct engagementDisc mount- Center Lock: Yes- 140 mm disc brake rotor compatible: Yes- Optbal (2:1): YesSeal:- Hub: Contact- Freehub body: Contact- Compatible spoke protector: TBDReflector:- JIS/CPSC: Cateye RR-550-WUW SW- AS: Cateye RR-550-WUA SW- DIN: Cateye RR-317-WUA SW- Average weight: 709 gTechnology:Cup & Cone Bearing:- A next-generation design. Full serviceability for long-lasting performance.Fully Tunable for High Performance:- Preferred by pro teams and expert bike shops, cup & cone bearing let mechanics fine-tune each bike to its absolute best. This is why Dura-ACE, built for racing at the highest level, purposefully adopts this construction.Our cup & cone bearing design sits at the heart of our high-performance wheels because it delivers what performance riders value ride after ride: smooth rolling under real-world cornering and sprint loads, long-term serviceability, and the ability to keep everything precisely adjusted.Dura-ACE R9300 wheels feature improved waterproof sealing and replaceable bearings for full serviceability. For a wheelset that feels fresh. Not just when it´s new, but season after season.Direct Engagement:- Innovative hub technology. Direct Engagement brings your power closer to the road. So when you ride harder, your wheels respond instantly.Instant power. Solid connection.:- By replacing traditional pawl mechanisms with a ratchet style engagement system, DIRECT ENGAGEMENT increases contact area inside the hub. The result is greater drive rigidity, reduced flex under load, and a far more direct transfer of power when you accelerate.What you feel on the ride:- Immediate engagement when you start pedaling- Firmer, more responsive acceleration under high torque- Stable, confident drive feel when sprinting or climbing- Smooth, refined operation with a premium hub feelCenter Lock:- The Center Lock system makes an easy rotor installation possible with spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency.Benefits & Features:- Light weight- Center Lock compatible hub has only spline mount and a lock ring. This means the lightweight of hub and rotor compared to 6-bolt mount system.- Lock ring rotor mounting system- Allows easier and faster rotor installation. Easy maintenance.- Secure fixing by spline mount- Improves braking efficiency.Optbal:- The Optbal rear wheel spoke system features an asymmetrical spoke layout, with a different number of spokes on the drive and non-drive sides. Traditional 1:1 spoke systems often suffer from uneven tension due to modern cassette spacing, which places significantly more stress on the drive side spokes—sometimes nearly double. This imbalance can lead to premature spoke failure and loosening of spoke nipples, ultimately compromising wheel durability and strength. OPTBAL addresses this issue by redistributing spoke tension more evenly, resulting in a stiffer, stronger, and more reliable wheel. On the front wheel, the Optbal design also enhances stability under the intense braking forces generated by disc brakes.E-THRU:- The tool-less type thru-axle skewer system optimizes rigidity and weight balance and enables easy operation with a reliable internal cam mechanism. The 15 mm thru-axle system is 15% stiffer torsionally and 25% stiffer in transverse shear than a traditional 9 mm quick release front axle system. High rigidity is secured while keeping the optimum weight balance. The E-THRU axle hub system minimizes the distortion of suspension while maintaining lightweight for riding around sharp corners at high speed.Benefits & Features:- 15mm E-Thru axle system- Satisfies both smooth rotation and high rigidity for excellent bike control.- Almost same stiffness as 20mm system- Lighter than 20mm thru-axle hub. tradeinn Bikeinn