Wolf Tooth Premium ZS Headsets - Zero Stack

Regular price
$74.95
Sale price
$74.95
Regular price

SKU: ZS44U-5MM-BLK

Fitment
S.H.I.S. Designation
Color Black
Expected Ship Date: Wed Jul 08
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Description

Wolf Tooth headsets are machined here in our Minnesota shop with aircraft-grade 6061 aluminum. They are designed to be lightweight, strong, and durable. Our headsets have three levels of industry-leading custom sealing to protect bearings from the elements and prolong the life of the headset. Available in a variety of colors. These ZS headsets are for frames with internal bearing cups that are pressed into the frame. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty on the bearings.

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 headsets ship with a star nut which can only be used on forks with steel or aluminum steerer tubes. For forks with carbon steerer tubes you will need a compression plug (sold separately). (Never use a star nut on a carbon steerer tube).

 

Wolf Tooth Headset parts

Upper assembly features:

  • Ultralight stem cap with integrated spacer plus an aluminum bolt and a star nut.
  • 6, 15 and 25 mm stack height top cover options  (6mm cover = 6mm total stack, 15mm cover = 15 total stack, 25mm cover = 25mm total stack).
  • O-ring seal prevents water intrusion around 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 protects lower bearing in the toughest conditions.
  • 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.

 

Recommendations

The Wolf Tooth crown race installation adapter will help avoid damaging the crown race seals.

Related Products

Tech Specs

Weight: 55-58g
Material: 6061 aluminum
Bevel Angle: 36 x 45 degrees
Stem Cap Bolt Torque Spec: 2-3 Nm with light grease on threads only

Made in the USA

Patent and trademark information

Product Images Disclaimer
Product images are for reference only and may not reflect the exact specifications, color, or components of the item offered for sale. Please refer to the product description and specifications for the most accurate details. If you have questions before purchasing, contact us and we’ll be happy to confirm.

Why Shop with AMG Cyclery?

ABOUT US

Who We Are

Born from a lifelong passion for all things bikes, AMG Cyclery is a small, family-run bike shop and community hub in Seaside, California. Founded by Alex and Alisa Gonzales, we believe cycling is for everyone — whether you’re chasing personal bests, heading out for a Sunday cruise, or just discovering two wheels for the first time. We build bikes that fit your style, service them with precision, and welcome every rider who walks through our doors. With a focus on community, craftsmanship, and riding culture, our shop has even been featured on The Radavist — a reflection of the unique bikes and vibrant energy you’ll find here.