Cannondale's patented OPI 3D forging process enables us to build hollow, seamless crank arms that are not only extremely light but also incredibly strong and stiff. In fact, they are the stiffest, strongest crank arms they've ever made. Lighter and stiffer than the competition and completely compatible with every HollowGram spider and chainring set-up, the HollowGram Si Cranks bring top-level performance to more price points.
Features: Road specific 52/36T 8 arm SpideRing 109mm axle with spacers Colour: Black Approx Weight : 602 grams (52/36T) Requires Cannondale Si Lock Ring Tool to fit and the Cannondale Crank Extraction Tool to remove
