Note: Chainring not includedThe next evolution of the venerable Turbine crank is here. Originally built in 1993 for a growing segment of North Shore riders who wanted a stiff and responsive crank without the weight penalty, the new Turbine honors that Shore legacy with the burly alloy workhorse you&';ve come to know and love. Based on rider and athlete feedback, RaceFace has narrowed the Q-Factor to match the feel of modern cranks. They also updated the preload collar (no more 2mm Allen bolt), shaved a few grams, and gave it a sleek modern look while we were at it. Proven (and future-proof) CINCH System allows you to quickly switch out a different chainring for your next race or road trip. Forged from 7000-series aluminum for maximum strength then machined to shave every unnecessary gram of weight. An incredibly stiff and responsive ride with uncompromised durability. Backed by a Lifetime Warranty Chainline: 52mm Axle and Crank Material: 7050 Aluminum Spindle Diameter: 30mm Weight: 515g