SHIMANO Dura-Ace Hollowtech II Crankset

The 110mm Bolt Circle Diameter (BCD) is the standard measurement for the bolt pattern on this crankset. It means you will need to ensure your chainrings are compatible with this specific 4-arm mounting pattern, which is common on modern compact and semi-compact road drivetrains.

This crankset uses the Shimano HOLLOWTECH II spindle standard. If your current frame uses a compatible Hollowtech II bottom bracket, it will be a direct swap; otherwise, you may need to install the appropriate bottom bracket cups to match your frame's shell.

The Q-factor refers to the distance between the outside of the crank arms. At 148mm, this is a standard road width designed to provide a natural, efficient pedaling stance that balances power transfer with rider comfort.

The HOLLOWGLIDE design uses a hollow outer chainring structure to significantly reduce weight without sacrificing rigidity. This stiffness is key to maintaining precise, snappy front shifting even when you are putting down maximum power.

While this crankset is designed as a 2x system with two chainrings, it is optimized for that specific configuration. If you are looking to convert to a 1x setup, you would need to source a compatible 1x chainring that fits the 110mm 4-arm bolt pattern.