Original Cannondale One crank arm. Cannondale aluminum crank arms are modular and versatile for use with mountain, road, cyclocross, and gravel applications. Built around the BB30/PF30 platform, Cannondale produces a number of spindles, spiders, and direct mount chainrings for their bikes. Compatible with Cannondale's spindles only for perfect fit. Cannondale One is the base model in the Cannondale crank family. The Hollowgram and Hollowgram SiSL2 are lighter weight and higher performance options. Spiders and spindles are interchangeable across the alloy Cannondale cranks. Cannondale One graphic adds a subtle touch of detail. Length: 175mm Side: Right Side/Drive Side Average Weight: 223 grams in 172.5mm length.