Chris King InSet i2 Headset

This headset is designed for frames with a 44mm head tube inner diameter. The ZS44 refers to the ZeroStack upper cup that sits flush inside the frame, while the EC44 refers to the External Cup lower assembly, which is necessary to accommodate the 1.5-inch tapered steerer tube.

The patented GripLock system uses a split-ring design that isolates the steerer tube from the headset bearings. This prevents the headset from loosening over time and protects your steerer tube from damage, ensuring a more secure and consistent adjustment.

Chris King bearings are fully serviceable. You can clean and re-grease them yourself using standard tools, which is why they are known for lasting significantly longer than sealed cartridge bearings that require full replacement.

By utilizing precision-machined aluminum cups and high-quality steel bearings, this headset reduces flex in the front end. This increased stiffness translates to more predictable steering and better tracking, especially on technical descents or rough terrain.

No, the InSet i2 is specifically engineered for tapered steerer tubes that transition from 1-1/8 inch at the top to 1.5 inch at the crown race. It will not fit a standard straight steerer fork.

Because the bearings are surgical-grade steel and fully serviceable, they require very little attention. A simple cleaning and re-greasing once a year—or more frequently if you ride in wet, muddy conditions—is typically enough to keep them running smoothly for years.