THESE ARE THE LIGHTEST PRODUCTION CRANKS ON THE MARKET. And yes, you heard it right. Ultra-lightweight construction and uncompromising strength. XCX Race Carbon Crank feature the spindle on the non-drive side of the crank for quick chainguide setup, and easy drivetrain maintenance. To match our ultra-lightweight crank arms, we also had to make a beautiful, lightweight solution to match: thus our UL Chainrings were born. Available in 30-36T Finally, these cranks include an 8mm self-extractor, meaning the cranks are easily removed with nothing more than an 8mm allen. Kiss proprietary tools goodbye.