We started making headsets in 1976 and have been refining them ever since. Our DropSet 5 is built to be dependable and sets the standard for quality. The integrated headset function delivers precision performance that is built on the same pedigree of Chris King headsets from the past 40 years.
Compatible with many Specialized mountain bike frames
Engineered, manufactured and assembled in Portland, Oregon USA
42mm 45x45 upper bearing for 6.85-7.05mm bearing ream depth.
52mm 45x45 lower bearing
Compatible with our included baseplate and 45 degree integrated crown races
The GripLock headset retention system uses an isolated wedge system to separate headset bearing adjustment from steerer tube location thus eliminating loose headsets on long travel mountain bikes while simultaneously removing any chance of headset inflicted fatigue on the lightweight carbon steerer tubes found on modern road forks. This is accomplished by isolating the thrust force that passes through the steerer tube from the bearing race that provides the radial force that preloads the headset bearing adjustment. In standard headset systems, this preloading wedge is affected by each impact that runs through the steerer tube making the headset more susceptible to coming out of adjustment. This is why a non-GripLockTM equipped headset will come out of adjustment in rough terrain or over a long ride; the wedge has been essentially hammered out of position. At the same time this hammering effect causes the wedge to clamp down repeatedly on your steerer tube. This repeated clamping could have an adverse effect on steerer tubes, in particular those made out of advanced materials like carbon fiber where it could potentially score and fatigue the steerer tube. By eliminating the effects of thrust force on a headset’s radial preload our patented GripLock system is the next generation of headset function and security.