Campagnolo: The new Chorus crankset is a true concentrate of technology and versatility. Technically advanced thanks to unidirectional construction technology in carbon fiber, it is produced directly molded without any surface coating and has an Ultra-Torque steel axle like the Record crankset. It is versatile thanks to its new ring of 123 mm bolts that, while giving it an extreme-performance structure, also ensures a wider variety of use segments. Available with 165, 170, 172.5 and 175 mm cranks, the new smaller ring of bolts on the Chorus crankset makes it compatible with 52/36, 50/34 chainrings and with the brand new 48/32 crowns. The Q Factor remains the same (145.5)The widths and biodynamics of the stroke are the same.Unidirectional carbon fiber cranks, steel axle and aluminum chainrings.Good stiffness and optimum power transmission.Symmetrical teeth on the internal chainringFluid, precise transmission, even with extreme cross-chaining.Optimized design for any chainring combinationMaximum performance, alwaysDouble ring of boltsAssembly of the large chainring on the crank is guaranteed by a ring of 123 mm bolts, while the two chainrings are coupled together by a ring of 96 mm bolts.Surface treatment of the chainrings for longer life