Campagnolo Potenza 11 Crankset - Power Torque Plus only requires a 14mm hex socket for installation and removal - 53/39 and 172.5mm - Campagnolo Power Torque cups, BSC aka English threaded - Same shape and design as Centaur 11, Chorus 11, Record 11 and SR 11 just made in aluminum - Lighter than Centaur 11 because of hollow aluminum crank arms