Cannondale Headset Bearings and Adapter Kits. Features: Adapter kits for converting Headshok frames to run either 1.5", tapered or 1 1/8" steerer forks include: cartridge bearings, crown race and upper bearing top cover Outer needle bearing races come in 3 lengths, and 4 thicknesses Inner needle bearing races come in 7 lengths, and 7 thickness: call Cannondale direct to confirm compatibility Specs: Model: KP205/ Description: Headshok/Lefty frame to tapered steerer adapter