Applications Shimano Hollowtech II, FSA Mega Exo, Race Face X-Type, Rotor: 3D,Rex 3.

Choose your seal/Lube options. Heavy weather or pure race seal and light lube. Bearings and housings are the same but lube and seal is optional. If you want more life from your road bearing choose the AC option.

RD= Road

AC= All weather & Cross or wet road riding.