The Chris King DropSet 3 Headset features their GripLock™ bearing cap that preloads the headset independently of clamping onto the steerer so it retains preload far better than other headset designs. The DropSet 3 is impervious to the ill effects of load spikes from large hits and heavy braking. This means smoother steering no more creaking and a longer lasting headset. GripLock™ design also takes the guesswork out of preloading a headset because the bearing preload force is independent of the clamping forceDropSet 3 headsets can be preloaded to a torque spec41mm 45x45 upper bearing / 52mm 36x45 lower bearingDropSet 3 headsets with their legendary made-in-house bearings are engineered manufactured and assembled in Portland Oregon USAIncludes baseplate and 36 degree integrated crown racesFeatures the King Lifetime Warranty S.H.I.S Upper IS41 S.H.I.S. Stem Clamp Diameter 28.6 Threadless S.H.I.S Lower IS52 Color Black, Matte Black, Matte Turquoise, Red, Silver Crown Race 40 Bearing Type Cartridge Defined Color Black, Green, Red, Silver