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
• Hollow aluminum crank arms
• Gear combination: 50-34T, 52-36T
• Compatible with 12-speed chain
• Recommended chain (not included): CN-M7100
• Recommended Bottom Bracket (not included): SM-BBR60 (threaded)/SM-BB72-41B (press-fit)
• Q-factor: 148 mm
