Campagnolo athena power torque carbon 11x chainsetthe most evident changes are on the first shift the newly designed chain up and down shift zones make shifting extremely fast and precise the new power torque system axle makes for high values of torsional stiffness and efficient power transmission without increasing lateral bulk features full carbon uni and multi directional cranks light alloy fixing nuts and bolts light alloy chainrings chainrings with xpss extreme performance shifting sys