Freehub Body for Powertap Hub and Wheel systems. Replace your existing freehub body or change between Shimano and Campagnolo.
This is for a 12mm axle system. See picture below to tell if your system is 12mm or 15mm
Powertap SL 2.4
Powertap SL 2.4+
Powertap Pro+ (up to 2009)