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 IS headsets are for frames with molded-in internal bearing cups. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty on the bearings.

Compatibility

• Any frame that uses IS (Integrated Standard) headsets with 41mm upper and 52mm lower outer bearing diameter.
• Uppers and lowers sold separately. 
• Enduro stainless steel sealed bearings included on both the upper and lower.
• IS42 is not compatible with Specialized mountain bikes or bikes using the Campagnolo Hiddenset standard
• 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).

Upper assembly features: 

• Ultralight Stem Cap with Integrated Spacer plus an aluminum bolt and a star nut.
• 7, 15, and 25mm stack height top cover options (7mm cover = 8mm total stack, 15mm cover = 15mm 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.
• bearing top cap outer diameter 45.8 mm

Lower assembly features:

• IS lower headset consists of a bearing and crown race only. The crown race is black anodized and not visible when installed.
• Custom over-molded dual-lip seal on the crown race to protect lower bearing in the toughest conditions.
• Headset 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

• Precision headset spacers
• Wolf Tooth crown race installation adapter
• Performance IS Headsets

Tech Specs

Weight: 7mm • 52g  |  15mm • 59g  |  25mm • 66g
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