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.
- Optimal balance of stiffness, strength, weight and rotational performance
- HOLLOWTECH II structure cuts weight yet maintains strength for better power transfer
- Crank arm length: 175 mm
- Q-factor: 148 mm
- Rear speeds: 12
- Compatible chain: HG 12-speed
- Chain line: 44.5 mm
- P.C.D.: 110 mm
- Chainring combination: 52-36T
- Q-factor: 148 mm
- HOLLOWTECH II
- HOLLOWTECH crank arm
- Recommended bottom bracket: Threaded (normal): SM-BBR60, Press-Fit: SM-BB72-41B
- Threaded bottom bracket shell width: 68 mm, 70
- Crank fixing screw included
- Average weight: 754 (50-34T)
