Shimano 105 FC-R7100 2 x 12-speed HOLLOWTECH II crankset not only brings a cult-like look and aesthetics, but also ensures even better performance. THE SCIENCE OF SPEED: Shimano 105 2x12-speed Crank FC-R7100. The next-generation SHIMANO 105 featuring Di2 draws on the design philosophy The Science of Speed bringing fresh momentum, comfort and control. It lets you embrace an open road, full of infinite possibilities. For those who have only experienced mechanical shifting and ergonomics, SHIMANO 105 Di2 represents a transformation of the road cycling experience. With function and technologies inherited from DURA-ACE and ULTEGRA, SHIMANO 105 is the culmination of years of research and development. With a shared Di2 platform, sophisticated ergonomics, SHIMANO 105-optimized Teeth combinations, and an exceptional brake system, SHIMANO 105 marks the start of affordable performance era. An attractive aluminum crank with hollow arms for lightweight, rigidity, and durability Robust crank arms offer an optimized balance between lightweight and efficiency. The crank, formed with hollow aluminum technology, is anodized with a beautiful gloss black anodized finish, giving it a luxurious look. The resin ribs on the back of the chainrings are SHIMANO 105's unique structural design that achieves both thorough weight reduction and crisp shifting performance.
- Optimal balance of stiffness, strength, weight and rotational performance
- HOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting
- Optimum power transfer Best balance for lighter weight and efficiency
- Robust crank arm
- Maintains high rigidity and reduces weight
- 4-arm construction crankset
- Iconic design
- Group: 105 Di2 R7100
- Teeth combination: 50-34T
- Q-factor: 148 mm
- Threaded BB shell width: 68 / 70 mm
- Compatible with 2x12-speed drivetrain system
- Construction: Hollowtech II
- Compatible chain: CN-M7100 HG 12-speed
- Bolt Circle Diameter (B.C.D.): 110 mm
- Chain line: 44.5 mm
- Crank arm length: 175 mm
- Material: Crank arm - Aluminum Anodized, Crank axle - Steel Plated, Large Teeth - Aluminum Anodized / Carbon fiber reinforced plastic, Small Teeth - Aluminum Anodized
- Weight: approx. 754 g
- Includes left side crank arm
TECHNOLOGIES
HOLLOWTECH II - Providing the best balance of stiffness, strength, weight and rotating performance. The concept of HOLLOWTECH II technology is focused on producing a superior crankset which will maximize a riders power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. HOLLOWTECH technology is an ultra-lightweight hollow crankarm created by SHIMANO with the companys own proprietary forging technology that also maintains rigidity. The addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.
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