Wolf Tooth Upper Headset

ZS44 refers to a Zero Stack headset with a 44mm inner diameter head tube, while 28.6 indicates it is compatible with a standard 1 1/8-inch steerer tube. This is a common standard for many mountain, road, and gravel frames, but you should always verify your frame's specific head tube measurements before purchasing.

The system uses a custom-molded upper lip seal and an additional O-ring to create a barrier against water and grit. This setup is specifically designed to keep the internal bearings clean during wet rides, which significantly reduces maintenance needs compared to standard headsets.

The bearings are stainless steel and designed for longevity, but they are also replaceable. Wolf Tooth offers a lifetime warranty on the bearings themselves, so you are covered if you encounter premature failure.

Yes, the assembly includes the headset itself, an ultralight stem cap, and an integrated spacer. You will still need a standard headset press tool to install the cups into your frame properly.

Absolutely. The use of aircraft-grade 6061 aluminum makes this headset both lightweight and robust enough to handle the impacts and vibration associated with trail and enduro riding.