CAMPAGNOLO CHORUS 12-SPEED ULTRA TORQUE CHAINSET. Unidirectional carbon fibre cranks, steel axle and aluminium chainrings: Good stiffness and optimum power transmission. Double fixing: Assembly of the large chainring on to the crank is secured by a ring of 123mm bolts, while the inner chainring is attached to the outer by way of 96mm BCD bolts.
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