Shimano wheelset Dura Ace C40 Schl. tires

Features

• OPTAL spoke system
• Ultra light full carbon rim
• Digital cone bearing adjustment system
• Best all-round wheelset
• Balanced combination of aerodynamics and low moment of inertia
• Fast acceleration
• Improved stiffness of the drivetrain
• Light and stiff
• Easy maintenance

OPTAL

The HR spoke system uses 21 spokes: 14 right and 7 left. The cassette width in today's wheels causes a balanced tension in traditional 1:1 spoke systems. This imbalance is intensified by the 11-speed cassette, which exerts almost double the tension on the spokes on the right.

Under certain circumstances, spokes with high and low tension can break or come loose. Unbalanced tension affects durability and strength. The OPTBAL design balances spoke tension, improving wheel stiffness and strength for a more robust wheel.

REAR WHEEL

• Model No.: WH-R9100-C40-TU-R
• QR: 163 mm, 168 mm
• Brake type: Rim brake
• Rim height: 37 mm
• Rim width: 28 mm
• Number of spokes: 21
• Weight: 747 g

FRONT WHEEL

• Model No.: WH-R9100-C40-TU-F
• QR: 133 mm
• Brake type: Rim brake
• Rim height: 37 mm
• Rim width: 28 mm
• Number of spokes: 16
• Weight: 637 g