105 HOLLOWTECH II Crankset 2×12-Speed

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 ✔