Shimano FC-M640 ZEE chainset and 68 and 73 mm bottom bracket, 36T, 165 mm
- Two piece construction using the tried and tested Hollow Tech II system, the right-hand crank arm forms one unit with the axle
- Solid crank arms for increased stiffness and strength
- Steel axle further increases stiffness and durability
- Available in 68-73mm (this one) and 83mm (available on request) bottom bracket fitment