Compatible with Athena 11 Speed Ergopower levers and cranksets with both standard and compact chainrings. Features a chrome-plated nickel cage and Z-shaped inner cage for increased stiffness and shifting speed.Anti-friction insert reduces friction between the chain and derailleur when shiftingCompatible with any 11 speed Campagnolo crankset when paired with 11 speed Power-Shift or pre 2015 Ultra-shift Ergopower shift levers