Campagnolo Athena Power Torque 11s Carbon Crankset - 170mm - 39/53tCampagnolo Athena Power Torque 11s Carbon Crankset 170mm 39 53t With a striking and cutting edge redesign, the Campagnolo Athena PTS Carbon 11 Speed Chainset has many riders, even those in the pro ranks, taking notice. The new four arm spider and stiff carbon crank arm ensure lightness, rigidity and the maximum power transfer through the pedals. The Athena axle has the brand new Power Torque System, made to have very high values of torsional stiffness