The Super Record S Wireless 2x 12-Speed crankset features the iconic Campagnolo design with visible carbon fiber, for a crankset conceived to deliver maximum accur. The Super Record Wireless S crankset is entirely made of unidirectiional carbon fiber and uses the Ultra-Torque locking system with a steel axle to transfer all the power applied on the pedals by the cyclist to the transmission Immediate unstoppable reactivity directed along a steel axle and lightweight cranks in unidirectiional carbon fiber The aluminum 2x chainring has been reworked for efficiency without compromise so each watt of power will be transferred to the road Symmetrical teeth on the internal chainring provides fluid, precise transmission, even with extreme cross-chaining High-quality bearings produces the now famous smoothness that has become a Campagnolo trademark Optimized design for any chainring combination to offer maximum performance Specifications Rings45/29Number of ChainringsDoubleDrivetrain Speeds12Chainline/Hub Compatibility135/142 Road Disc Hubs < 415 mm ChainstayChainline/Hub Compatibility135/142 Road Disc Hubs > 415 mm ChainstayColorCarbonCrank Length (mm)175Crank Intended UseRoadBB IncludedOtherPedal Spindle9/16"Spindle Interface TypeCampagnolo Ultra-TorqueDefined ColorCarbon