{"product_id":"wolf-tooth-premium-zs-headsets-zero-stack","title":"Wolf Tooth Premium ZS Headsets - Zero Stack","description":"\u003cp\u003eWolf 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.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAny frame that uses ZS (Zero Stack) headsets with 44mm upper and 56mm lower head tube inner diameter.\u003c\/li\u003e\n\u003cli\u003eUppers and lowers sold separately.\u003c\/li\u003e\n\u003cli\u003eEnduro stainless steel sealed bearings included on both the upper and lower.\u003c\/li\u003e\n\u003cli\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\u003cspan\u003e \u003c\/span\u003e\u003ca title=\"compression plug for forks with carbon steerer tubes\" href=\"https:\/\/www.wolftoothcomponents.com\/collections\/headset-related\/products\/wolf-tooth-precision-headset-small-parts?variant=7193253511203\"\u003ecompression plug\u003c\/a\u003e (sold separately). (Never use a star nut on a carbon steerer tube).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"PdpSqImgLinks\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/www.wolftoothcomponents.com\/pages\/headset-fitment-guide\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/MeasureHeadset_medium.jpg?v=1550605546\" alt=\"\" width=\"155\" height=\"155\"\u003e\u003c\/a\u003e \u003ca href=\"https:\/\/www.wolftoothcomponents.com\/products\/wolf-tooth-precision-headset-small-parts\"\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/ReplacementParts-Headset_160x160.jpg?v=1590086563\" width=\"155\" height=\"155\" data-mce-style=\"float: none;\"\u003e\u003c\/a\u003e \u003ca href=\"https:\/\/www.wolftoothcomponents.com\/pages\/headset-technical-information\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/Headset_Tech_c3897e65-a523-4350-8aff-9290078bc929_480x480.jpg?v=1590091876\" alt=\"\" width=\"155\" height=\"155\"\u003e\u003c\/a\u003e \u003ca data-mce-fragment=\"1\" title=\"Wolf Tooth color shop - choose color components for your bike\" href=\"https:\/\/www.wolftoothcomponents.com\/pages\/color-shop\" data-mce-href=\"https:\/\/www.wolftoothcomponents.com\/pages\/color-shop\"\u003e\u003cimg data-mce-fragment=\"1\" height=\"186\" width=\"155\" alt=\"Color Shop - Choose Wolf Tooth anodized color components for your bike\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/ColorShopButton_0c05b716-d5a6-41e3-9306-7c5aba20041f_480x480.jpg?v=1650986151\" data-mce-selected=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/ColorShopButton_0c05b716-d5a6-41e3-9306-7c5aba20041f_480x480.jpg?v=1650986151\"\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/WT_Headset_stacked_Bottom_stainless_Labels_36d51072-81fc-4392-aa5d-e857e1578e5b.jpg?v=1590090070\"\u003e\u003c\/p\u003e\n\u003cp\u003eUpper assembly features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUltralight stem cap with integrated spacer plus an aluminum bolt and a star nut.\u003c\/li\u003e\n\u003cli\u003e6, 15 and 25 mm stack height top cover options  (6mm cover = 6mm total stack, 15mm cover = 15 total stack, 25mm cover = 25mm total stack).\u003c\/li\u003e\n\u003cli\u003eO-ring seal prevents water intrusion around steerer tube.\u003c\/li\u003e\n\u003cli\u003eCustom-molded upper lip seal provides additional protection for upper bearing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLower assembly features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCustom-molded dual-lip seal on the crown race protects lower bearing in the toughest conditions.\u003c\/li\u003e\n\u003cli\u003eAll components precision machined in-house at Wolf Tooth from aircraft grade aluminum to ensure the highest level of quality.\u003c\/li\u003e\n\u003cli\u003eService and additional parts available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eRecommendations\u003c\/h2\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/www.wolftoothcomponents.com\/products\/crown-race-installation-adapter\"\u003eWolf Tooth crown race installation adapter\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003ewill help avoid damaging the crown race seals.\u003c\/p\u003e\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wolftoothcomponents.com\/products\/wolf-tooth-headset-spacers\"\u003ePrecision headset spacers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wolftoothcomponents.com\/products\/crown-race-installation-adapter\"\u003eWolf Tooth crown race installation adapter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wolftoothcomponents.com\/products\/wolf-tooth-performance-zs-headsets-zero-stack\"\u003ePerformance ZS Headset\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTech Specs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWeight: \u003c\/strong\u003e55-58g\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e\u003cspan\u003e 6061 aluminum\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eBevel Angle: \u003c\/strong\u003e36 degrees\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eStem Cap Bolt Torque Spec:\u003c\/strong\u003e 2-3 Nm with light grease on threads only \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMade in the\u003cspan\u003e \u003c\/span\u003eUSA\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/www.wolftoothcomponents.com\/pages\/wolf-tooth-patents-and-trademarks\"\u003ePatent and trademark information\u003c\/a\u003e\u003c\/p\u003e","brand":"Wolf Tooth Components","offers":[{"title":"Black \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406085988407,"sku":"ZS44U-5MM-BLK","price":69.95,"currency_code":"USD","in_stock":true},{"title":"Red \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406086021175,"sku":"ZS44U-5MM-RED","price":64.95,"currency_code":"USD","in_stock":true},{"title":"Blue \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406086053943,"sku":"ZS44U-5MM-BLU","price":64.95,"currency_code":"USD","in_stock":true},{"title":"Orange \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406086119479,"sku":"ZS44U-5MM-ORG","price":64.95,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406086152247,"sku":"ZS44U-5MM-GLD","price":64.95,"currency_code":"USD","in_stock":true},{"title":"Black \/ Upper \/ ZS44\/28.6 15mm Stack","offer_id":41406086250551,"sku":"ZS44U-15MM-BLK","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Red \/ Upper \/ ZS44\/28.6 15mm Stack","offer_id":41406086283319,"sku":"ZS44U-15MM-RED","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Green \/ Upper \/ ZS44\/28.6 15mm Stack","offer_id":41406086414391,"sku":"ZS44U-15MM-GRN","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Orange \/ Upper \/ ZS44\/28.6 15mm Stack","offer_id":41406086316087,"sku":"ZS44U-15MM-ORG","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Gold \/ Upper \/ ZS44\/28.6 15mm Stack","offer_id":41406086348855,"sku":"ZS44U-15MM-GLD","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Black \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086447159,"sku":"ZS44U-25MM-BLK","price":69.95,"currency_code":"USD","in_stock":true},{"title":"Red \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086479927,"sku":"ZS44U-25MM-RED","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Blue \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086512695,"sku":"ZS44U-25MM-BLU","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Green \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086643767,"sku":"ZS44U-25MM-GRN","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Orange \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086545463,"sku":"ZS44U-25MM-ORG","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Gold \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086578231,"sku":"ZS44U-25MM-GLD","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Black \/ Lower \/ ZS56\/40","offer_id":41406086676535,"sku":"ZS56L-40-BLK","price":59.95,"currency_code":"USD","in_stock":true},{"title":"Red \/ Lower \/ ZS56\/40","offer_id":41406086709303,"sku":"ZS56L-40-RED","price":59.95,"currency_code":"USD","in_stock":false},{"title":"Blue \/ Lower \/ ZS56\/40","offer_id":41406086742071,"sku":"ZS56L-40-BLU","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Green \/ Lower \/ ZS56\/40","offer_id":41406086873143,"sku":"ZS56L-40-GRN","price":59.95,"currency_code":"USD","in_stock":false},{"title":"Orange \/ Lower \/ ZS56\/40","offer_id":41406086807607,"sku":"ZS56L-40-ORG","price":59.95,"currency_code":"USD","in_stock":false},{"title":"Gold \/ Lower \/ ZS56\/40","offer_id":41406086840375,"sku":"ZS56L-40-GLD","price":59.95,"currency_code":"USD","in_stock":false},{"title":"Nickel \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406086185015,"sku":"ZS44U-5MM-NI","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Nickel \/ Upper \/ ZS44\/28.6 15mm Stack","offer_id":41406086381623,"sku":"ZS44U-15MM-NI","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Nickel \/ Upper \/ ZS44\/28.6 25mm Stack","offer_id":41406086610999,"sku":"ZS44U-25MM-NI","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Raw Silver \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41406086217783,"sku":"ZS44U-5MM-RSIL","price":64.95,"currency_code":"USD","in_stock":false},{"title":"Raw Silver \/ Lower \/ ZS56\/40","offer_id":41406086905911,"sku":"ZS56L-40-RSIL","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Ultraviolet Purple \/ Upper \/ ZS44\/28.6 6mm Stack","offer_id":41475474063415,"sku":"sku-40722399002659","price":69.95,"currency_code":"USD","in_stock":false},{"title":"Ultraviolet Purple \/ Lower \/ ZS56\/40","offer_id":41475474096183,"sku":"sku-40722399035427","price":69.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/2046\/files\/WT-ZS44U-5MM-BLU-01.jpg?v=1733785520","url":"https:\/\/www.probikesupply.com\/products\/wolf-tooth-premium-zs-headsets-zero-stack","provider":"Pro Bike Supply","version":"1.0","type":"link"}