{"product_id":"wolf-tooth-premium-headset-upper-lower-zs4-4-28-6-6mm-stack-upper-zs56-lower-espresso","title":"Wolf Tooth Premium Headset Upper \u0026 Lower ZS4 4\/28.6 6MM Stack Upper ZS56 Lower Espresso","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.\u003cbr\u003e \u003cbr\u003eCompatibility\u003cbr\u003eAny frame that uses ZS (Zero Stack) headsets with 44mm upper and 56mm lower head tube inner diameter.\u003cbr\u003eUppers and lowers sold together as a set.\u003cbr\u003eEnduro stainless steel sealed bearings included on both the upper and lower.\u003cbr\u003eUpper 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).","brand":"Wolf Tooth","offers":[{"title":"Default Title","offer_id":40081740857407,"sku":"tga-23-Wolf-ZS44U-ZS56L-ESP","price":119.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/3539\/products\/2edfc8e1-f048-5811-977d-2e4e44ca7a2a.png?v=1681750161","url":"https:\/\/thegearattic.com\/products\/wolf-tooth-premium-headset-upper-lower-zs4-4-28-6-6mm-stack-upper-zs56-lower-espresso","provider":"The Gear Attic","version":"1.0","type":"link"}