The beautiful thing about Mavic wheels is the ability to easily convert your wheels from Shimano to Campagnolo compatability and vice versa. Simply purchase the freehub body for the appropriate style (Campy ED10 or Shimano M10), make the swap, and your wheels are ready for the new drivetrain. Also, If you are experiencing problematic freewheeling, its possible that you can save your expensive wheels by replacing the damaged freehub. Thankfully, all current (2002 to present) Mavic road wheels use the same freehub body (9 or 10 speed shimano, 10 speed campy).