General Info
A sleek aluminum crankset featuring hollow arms for a blend of lightness, strength, and longevity
The freshly engineered 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 rear 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: 160, 165, 170, 172.5, 175 mm
- Gear combination: 50-34T, 52-36T
- Q-factor: 148 mm
Technical Specs
Product Specifications
- MODEL NO FC-R7100
- SERIES SHIMANO 105 R7100 Di2 Series
- Colour Black | Black
- Average weight 754 (50-34T
- Rear speeds 12 – 12
- Compatible chain HG 12-speed
- Chain line (mm) 44.5 – 44.5
- P.C.D. (mm) 110 – 110
- Spider/gear arms 4
- Chainring combination 50-34T, 52-36T | 50-34T
- Q-factor (mm) 148
- Crank arm length (mm)|160 ✔
- Crank arm length (mm)|165 ✔
- Crank arm length (mm)|170 ✔
- Crank arm length (mm)|172.5 ✔
- Crank arm length (mm)|175 ✔
- Optional chain guard|Without chain/bash guard ✔
- HOLLOWTECH II ✔
- HOLLOWTECH crank arm ✔
- Compatible bottom bracket type|Outboard ✔
- Recommended bottom bracket|Threaded (normal) SM-BBR60 | SM-BBR60
- Recommended bottom bracket|Press-Fit SM-BB72-41B | SM-BB72-41B
- Threaded bottom bracket shell width (mm)|68 ✔
- Threaded bottom bracket shell width (mm)|70 ✔
- Crank fixing screw included ✔
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