Thule's Prologue Bike Mount is ready to haul nearly any bike. It's compatible with bicycles featuring standard forks, including carbon forks and those with disc brakes. The mount's tray accommodates tires up to 2.6-inches wide. The Prologue fits round, aero and square crossbars, too. Plus, the fork mount features a dual-lock head that locks your rig to the mount and locks the mount to the rack.