Shimano Dura Ace R9170 C60 Disc Tubular road rear wheel

Pro race performance, all-weather confidence


Features:

- CENTER LOCK
- D2 rim
- OPTBAL spoke system
- Road E-THRU 12 mm
- Ultra-light full carbon rim

BENEFIT:

- For the performance driven triathlete and road racer
- Balanced low inertia & aerodynamics
- Aerodynamic performance
- Improved drive rigidity
- Lightweight within rigid
- Disc brake system


Specifications:

- Average weight: 829 g
- Remarks: * The adapter is needed to use 10-speed CS
- Axle_Fixing method: 12mm E-THRU
- Thru Axle(Length: Inner diameter)_142 x 12 mm
- Bearing_Cone: CBN finish
- Bearing_Cup: CBN finish
- Bearing_Stainless: ball
- Brake Type: CENTER LOCK disc brake
- Compatible Spoke protector: CP-W1460
- Disc mount: 140mm Disc rotor compatible
- Disc mount: Center lock
- Front / Rear: Rear
- O.L.D. (mm): 142
- Rear speeds: 10*/11
- Reflector_AS: CATEYE RR-550-WUA SW
- Reflector_DIN: CATEYE RR-317-WUA SW
- Reflector_JIS/CPSC: CATEYE RR-550-WUW SW
- Rim_Height (mm): 60
- Rim_Rim joint: 28
- Spokes Number: 24
- Tire_Recommended size: 23-28´´ - 28-28´´
- Tire Type: Tubular
- Wheel Size: 700C

Technology:

D2 RIM:
- 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 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.

CUP & CONE BEARING:
- Angular contact bearings of the cup & cone type offer greater strength than sealed cartridge industrial bearings due their ability to displace lateral and vertical loads more effectively for super smooth rotation and longer durability. Angular contact bearings also allow easier maintenance, adjustability and serviceability.

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