Universal Cycles -- Wolf Tooth IS42 Upper Specialized Headsets [IS42U-SPEC-3MM-BLK]

<p>Wolf Tooth headsets are machined in our Minnesota shop with aircraft-grade 6061-T6 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. This has a stack height of 3mm and is available in colors to match other Wolf Tooth anodized color options. These IS headsets are made exclusively for Specialized frames with molded-in internal bearing cups. Like all Wolf Tooth Premium Headsets with Enduro stainless steel bearings, the Premium IS Headset for Specialized has a lifetime warranty.</p> <p>Compatibility</p> <ul> <li>Any Specialized bike that uses an IS (Integrated Standard) headset with 42mm upper bearing diameter.</li> <li>Uppers and lowers sold separately.</li> <li>Enduro stainless steel sealed bearings included on both the upper and lower.</li> <li>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).</li> </ul> <p>Known Compatible Specialized Bike Models</p> <p>Aluminum Mountain Bikes (all except Chisel HT aluminum)<br />Camber Carbon 2014<br />Chisel Alloy HT (Smartweld HT) 2017-2021<br />Enduro 29 Carbon 2014<br />Enduro Carbon 2017, 2020<br />Epic Carbon 2014<br />Epic FSR 2021<br />Epic FSR Carbon 2018<br />Epic HT 2017, 2020<br />Fatboy Carbon 2015<br />Fuse Carbon 2017<br />Stumpjumper 2021<br />Stumpjumper Carbon 2019<br />Stumpjumper EVO 2021<br />Stumpjumper FSR Carbon 2016</p> <p>Upper assembly features</p> <ul> <li>Ultralight Stem Cap with 5mm Integrated Spacer plus an aluminum bolt and a star nut.</li> <li>One 3mm stack height top cover option.</li> <li>O-ring seal prevents water intrusion around steerer tube.</li> <li>Custom-molded upper lip seal provides additional protection for upper bearing.</li> </ul>