Shimano Dura Ace R9270 C50 Disc Road Bike Wheels

The Shimano Dura Ace R9270 C50 Road bike wheels for disc brakes are suitable for tubeless and folding tyres. Shimano has worked tremendously on aerodynamics, stiffness and power transmission. The Shimano Dura Ace R9270 C50 wheelset has an internal rim width of 21mm and an external rim width of 28mm. This makes the wheels very suitable for 28mm tyres or wider. This has led to a significant improvement in aerodynamics. The 1:1 spoke pattern in combination with 1.5mm spokes have provided more stiffness. And a direct engagement hub should ensure quick engagement torque when powering up.

Riding characteristics
The Shimano Dura Ace C50 wheels feel incredibly comfortable in your bike. Whereas other deep carbon wheels require some getting used to when it comes to stability in the wind and downhill, the Shimano Dura Ace wheels feel right from the start. You hardly notice that you are riding with 50mm wheels. They feel direct at every turn and, despite being 50mm deep, you can use them perfectly on climbs. High speed descents don't feel nervous at all and they steer very directly into corners.

Aerodynamics
The aerodynamics of the Shimano Dura Ace R9270 C50 have been considerably improved. This is partly due to the wide rim profile with an external rim width of 28mm. The aerodynamic drag is considerably lower with a rim of these dimensions. Compared to Shimano Dura Ace R9100 C40 wheels, an impressive 5.1 watts of aerodynamic drag is gained just from the deeper rim. In addition, another 1 watt is gained compared to the Shimano Dura Ace R9100 C60 tubular wheel. These gains were achieved while maintaining other properties such as stiffness, comfort and control.

Stiffness
To achieve higher stiffness, the 1:1 spoke pattern has been added to the front wheel. Also, stronger spokes of 1.5mm thickness have been used to optimise stiffness without compromising weight. The so-called Direct Engagement system has been developed and added to the rear hub, increasing power transfer efficiency by 63%.

Shimano Dura Ace 12 speed body
For Dura Ace 12 speed, Shimano has developed a new body type. This body has more notches, so the cassette will not wear out the body so easily. The disadvantage is that only Shimano Dura-Ace 12 speed cassettes fit this body.

• Shimano Dura Ace WH-R9270-C50-TL-F
• Shimano Dura Ace WH-R9270-C50-TL-R
• Tubeless valves