Kit includes two custom aluminum bearing shells/cups, two KR047/ steel bearings preinstalled, two black Cannondale alloy bearing shields, two FSA brass/rubber bearing shields, one wave washer, and one FSA 0.5mm shim. (Only use one set of bearing shields when installing.)

The aluminum cups have a lower profile than the standard plastic shell providing the needed clearance for your crankset. This is also an upgrade kit from standard nylon PressFit cup/bearing systems.