An updated design with the same dimensions of previous years The right hand crank arms are coupled two by two in the zones subject to greater force applied by the cyclist for unmatched strength to weight Unidirectional carbon fibre hand cranks, steel axle and aluminium chainrings off substantial stiffness and excellent power transfer Compatible with all frame systems, regardless of the width of the rear chainstay 175x53/39 UT CRBN 145/112mm Campy 618g 2x12