Or as low as 
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.
BENEFIT
Optimal balance of stiffness, strength, weight and rotational performance
BENEFIT
HOLLOWTECH II structure cuts weight yet maintains strength for better power transfer
BENEFIT
Crank arm length: 170
BENEFIT
Gear combination: 52-36T
BENEFIT
Q-factor: 148 mm
