Shimano 105 FC-R7100 crankset
An attractive aluminum crank with hollow arms for lightweight, rigidity, and durability
The newly designed 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.
Features
- Optimal balance of stiffness, strength, weight and rotational performance
- HOLLOWTECH II structure cuts weight yet maintains strength for better power transfer
- Crank arm length: 170 mm
- Gear combination: 52-36T
- Q-factor: 148 mm
Tech spec
- Series: SHIMANO 105
- Rear speeds: 12
- Compatible chain: HG 12-speed
- Chain line: 44.5 mm
- P.C.D: 110 mm
- Spider/gear arms: 4
- Chainring combination: 52-36T
- Q-factor: 148 mm
- Crank arm length: 170 mm
- HOLLOWTEC crank
- Bottom bracket: Outboard
- Recommended bottom bracket: SM-BBR60 BSA / SM-BB92-41B Pressfit
- Crank fixing screw included
- Bottom bracket length: 68/70 mm
- Real weight: 778 g
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 rider’s 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. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s 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. The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design. High Precision Sealing Moreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.