SHIMANO WH-R9270-C36-TL-R complete hub axle 12 x 142 mm

With stunning acceleration, the new DURA-ACE R9270 C36 wheelset will change the way you experience climbs, corners, even stop lights. This is because it isn´t just how much a wheel weighs but where the weight is on the wheel that matters. The all-new C36 design shaves mass at every opportunity but especially at the rim. The result is a lively wheelset that can transform your ride. With both a lighter, wider all-carbon rim and a lighter hub, the new DURA-ACE C36 won´t shy away from a day of climbing. The new rim is 36 mm deep and still delivers good aerodynamic efficiency despite its gossamer weight. Meanwhile the hub features an alloy FREEHUB body and new engagement mechanism for increased rigidity. Features: - 36 mm height full carbon rim - Internal rim width: 21 mm - DIRECT ENGAGEMENT - Compatible only with Shimano road 12-speed cassette sprockets Specifications: - Average weight: 730 - Specification: R - Front/Rear: Rear - Brake type: CENTER LOCK disc brake - Rear speeds: 12 - O.L.D. (mm): 142 - Wheel size: 622 x 21C (700C) - Tire Type: Tubeless - Tire Recommended size: 25-622 - 32-622 - Rim Height (mm): 36 - Rim Internal width (mm): 21 - Rim External width (mm): 28 - Rim Requires rim tape: Yes - Spokes Number: 24 - Spokes Straight pull: Yes - Spokes Bladed: Yes - Spokes Butted: Yes - Spokes Diameter (mm): 2.0-1.5-2.0 - Axle fixing method: 12 mm E-THRU - Thru axle (length x inner diameter ; mm) 142 x 12: Yes - Spline type HG spline L2 (ROAD 12-speed dedicated): Yes - Engagement type: Direct engagement - Disc mount CENTER LOCK: Yes - Disc mount 140 mm disc brake rotor compatible: Yes - OPTBAL (2:1): Yes - D2 rim: Yes - Reflector JIS/CPSC: CATEYE RR-550-WUW SW - Reflector AS: CATEYE RR-550-WUA SW - Reflector DIN: CATEYE RR-317-WUA SW Technology: D2: - Aerodynamic performance is affected by wind direction. To create the D2 rim, SHIMANO engineers considered both frontal and cross winds, aiming to achieve optimal performance in real-world riding conditions. Extensive prototype testing, in the wind-tunnel and on the road, proved that a wide rim shape with a deep tire bed performs best across a wide range of conditions. At yaw angles ranging from 0 to 15 degrees, the SHIMANO D2 rim profile reduces air drag better than others aero shape rims. This rim design also boosts lateral wheel stiffness and offers improved vertical compliance for increased control, comfort and durability on the road. Optbal: - The OPTBAL rear wheel spoke system features 21 spokes—14 on the drive side and 7 on the non-drive side. Cassette spacing in today’s wheels produces unbalanced tension in traditional 1:1 spoke systems. This unbalance is intensified with the 11-speed cassette, producing nearly double the tension on the drive side spokes. Generally high and low tension spokes have respectively tendency toward breaking down and coming loose spoke nipples. Unbalanced tension affects durability and strength. The OPTBAL design rebalances spoke tension, enhancing wheel rigidity and strength for a more durable wheel. Center 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. 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.