Wolf Tooth Precision Headsets are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements. Available in a variety of colors to add some style to your bike. These ZS headsets are for frames with internal bearing cups that are pressed into the frame. 
Compatibility:
- Any frame that uses ZS (Zero Stack) headsets with 44mm upper and 56mm lower head tube inner diameter
- Uppers and Lowers sold separately
- Enduro stainless steel sealed bearings included on both the upper and lower
- Upper assembly features:
- Wolftooth signature 5 mm integrated spacer plus stem cap with an aluminum bolt and a star nut comes also comes with the top assembly.
- O-ring seal prevents water intrusion around the steerer tube
- Custom molded upper lip seal provides additional protection for upper bearing
- Lower assembly features:
- Custom molded dual lip seal on the crown race to protect lower bearing in the toughest conditions