The DropSet 2 Headset features the 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 2 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.Patented GripLock retention design for exclusively reliable headset adjustment42mm 45x45 upper bearing52mm 45x45 lower bearingCompatible with King baseplate and 45 degree integrated crown racesItem SpecificationsBearing TypeCartridgeColorBlackCrown Race30Defined ColorBlackS.H.I.S LowerIS52S.H.I.S UpperIS42S.H.I.S. Stem Clamp Diameter28.6 Threadless Chris King DropSet 2 Headset Headsets UPC: 841529091458