Campagnolo Record Carbon Ultra Torque 12 Speed Chainset , Black, 172.5 mm 50-34T

The Record 12 x 2 Speed crank set: A new hole-free design for the right hand crank that optimises aerodynamics. The carbon fibre Record 12 x 2 Speed crank set with unidirectional finishing guarantees continuity with the finishing's of the entire group set, whilst maintaining the Ultra-Torque bracket system on the steel axle to ensure perfect transmission of power. The Record 12 x 2 Speed crank set can be installed on any type of frame, whether or not it is being used with disc brakes because it optimises the chain line on the frame with a rear hub flange measuring 130, 135 or 142 millimetres, without affecting the Q factor that remains constant at 145.5 millimetres. The design of the outer chain ring ensures faster, quieter derailing owing to the contoured pin. The symmetrical design of the inner chain ring teeth allows improved stability with chain crossovers. The double wheel sizing standards (112 and 145 millimetres) enable reducing the weight through greater use of carbon fibre. There are eight fixing screws for increased structure stiffness. The varying number of pins for each of the three chain ring combinations (34/50, 36/52, 39/53) facilitates upshifting due to the optimised free strokes associated with each combination. The special drains on the inside of the outer chain rings optimise performance when downshifting in dead spots.