Shimano Dura-Ace R9270 C50 Carbon CL Disc Wheel

Shimano Dura-Ace R9270 C50 Carbon CL Disc Wheel

The Dura-Ace R9270 C50 Carbon CL Disc Wheel is Tubeless Ready and features an aerodynamic 50mm-deep-section full carbon rim. Designed and engineered to provide exceptional speed, agility and style, this quality carbon race wheel offers the perfect balance of aerodynamics and crosswind stability at a low weight. And it has a Centre Lock rotor mount for use with disc brakes and the rear wheel is compatible with Shimano HG 11 and 12-Speed cassettes.

The all-rounder of the new Dura-Ace wheel line-up, the C50 is both lighter than the previous C40 model and nearly as aerodynamic as the previous C60. It’s a wheelset at home in a wide range of conditions. From time trials to criteriums, on rolling terrain or attempting a personal best, the new C50 is the ideal wheel for spirited road riding.

The perfect blend of low weight and aerodynamic performance, the all-new Dura-Ace C50 features an updated all-carbon tubeless rim and new hub design that drops weight while enhancing rigidity.

Centre-Lock Disc Rotor Mount

The Centre Lock system makes an easy rotor installation possible with a 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.

D2 Aerodynamic Rim Profile

Aerodynamic performance is affected by wind direction. To create the D2 rim, Shimano engineers considered both frontal and crosswinds, 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.

Rear Wheel OPTBAL Spoke System

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.

Shimano E-Thru Axle System

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.

Features:

• Series: Dura-Ace R9200 Series
• All-round tubeless wheels with balanced aerodynamics and lightweight materials
• 50mm height Full Carbon Rim
• Internal Rim Width: 21mm
• Disc Brake Mount: Centre Lock Disc
• D2 Aerodynamic rim profile
• Axle System: 12mm E-Thru / Hub Spacing (O.L.D.): Front: 100mm; Rear: 142mm
• Freehub: Shimano 12-Speed (Compatible only with Shimano road 12-Speed cassette sprockets)
• Tyre Type: Clincher Tubeless; Recommended Tyre Size: 25-622 – 32-622
• Weight: 787g (rear); 674g (front)

A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).

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