Wolf Tooth Premium ZS Headsets - Zero Stack Upper

This is only the upper bearing cup, You also need the Lower cup for a complete headset

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
• Click here to see our complete guide on how to determine which headset you need.
• We recommend using the Wolf Tooth crown race installation adapter to install the crown race and avoid damaging the crown race seals

Complementing Products:

• Precision headsets spacer
• Alloy water bottle cage bolts
• Wolf Tooth crown race installation adapter

Tech Specs:

• Uppers and Lowers sold separately
• Enduro stainless steel sealed bearings included on both the upper and lower
• Upper assembly features:
  • Our signature 5 mm integrated spacer plus stem cap with an aluminum bolt and a star nut
  • 5, 15 and 25 mm stack height top caps
  • 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
• The Wolf Tooth crown race installation adapter installs the crown race without damaging the crown race seals
• All components precision machined in-house at Wolf Tooth from aircraft grade aluminum to ensure the highest level of quality
• Service and additional parts available
• Available colors: black, silver, red, blue, green, orange, purple, gold