{"product_id":"wolf-tooth-performance-zs-headsets-zero-stack","title":"Wolf Tooth Performance ZS Headsets - Zero Stack","description":"\u003cp\u003e\u003cstrong\u003eWolf Tooth Performance ZS Headsets - Zero Stack\u003c\/strong\u003e are precision-machined in Minnesota from aircraft-grade 6061 aluminum, delivering a clean aesthetic, reliable sealing, and long-term durability for modern frames that use Zero Stack (ZS) headsets. Designed for riders who value both performance and finish detail, this headset balances lightweight construction with robust weather protection.\u003c\/p\u003e\n\n\u003cp\u003eBuilt around \u003cstrong\u003eEnduro black oxide sealed bearings\u003c\/strong\u003e, the Performance ZS headset provides smooth steering performance and dependable longevity. Wolf Tooth’s three levels of custom sealing protect against water, grit, and trail debris—extending bearing life in real-world riding conditions. Whether you’re building a trail bike, gravel machine, or road frame with ZS head tube dimensions, this headset delivers refined steering feel and confident reliability.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in a wide range of anodized colors, the Wolf Tooth Performance ZS Headset allows you to integrate subtle color accents into your cockpit without compromising function. Uppers and lowers are sold separately, giving you flexibility to match your specific frame requirements.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeadset Type:\u003c\/strong\u003e ZS (Zero Stack)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Tube Inner Diameter:\u003c\/strong\u003e 44mm upper | 56mm lower\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Enduro black oxide steel sealed bearings (upper and lower)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpper Sold With:\u003c\/strong\u003e Star nut (for steel or aluminum steerers only)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCarbon Steerer Requirement:\u003c\/strong\u003e Compression plug required (never use a star nut with carbon)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpper \u0026amp; Lower:\u003c\/strong\u003e Sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUpper Assembly Features\u003c\/h3\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTop Cover Stack Height:\u003c\/strong\u003e 6mm total stack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Ultralight Stem Cap:\u003c\/strong\u003e Includes aluminum bolt and star nut\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eO-Ring Seal:\u003c\/strong\u003e Prevents water intrusion around steerer tube\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Upper Lip Seal:\u003c\/strong\u003e Additional protection for upper bearing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLower Assembly Features\u003c\/h3\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Dual-Lip Crown Race Seal:\u003c\/strong\u003e Protects lower bearing in harsh conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Machined Components:\u003c\/strong\u003e Manufactured in-house from 6061 aluminum\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTech Specs\u003c\/h3\u003e\n\u003cul class=\"specs_at_a_glance\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 6061 aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBevel Angle:\u003c\/strong\u003e 36° x 45°\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 55–58g\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStem Cap Bolt Torque:\u003c\/strong\u003e 2–3 Nm (light grease on threads only)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in the USA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e One-year warranty on Performance Headsets with Enduro black oxide bearings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Recommendation\u003c\/h3\u003e\n\u003cp\u003eFor proper installation and to avoid damaging crown race seals, using a dedicated crown race installation adapter is recommended. Service parts and additional components are available to support long-term maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eFinal Take\u003c\/h3\u003e\n\u003cp\u003eThe Wolf Tooth Performance ZS Headsets - Zero Stack combine clean aesthetics, thoughtful sealing design, and precision machining for riders building high-quality bikes. With reliable Enduro bearings, refined 6mm top cover stack, and durable in-house manufacturing, this headset delivers smooth steering performance and long-term confidence on any ZS-compatible frame.\u003c\/p\u003e","brand":"Wolf Tooth","offers":[{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Black","offer_id":45079730126892,"sku":"ZS44U-5MM-BLK-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Red","offer_id":45079730159660,"sku":"ZS44U-5MM-RED-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Blue","offer_id":45079730192428,"sku":"ZS44U-5MM-BLU-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Orange","offer_id":45079730225196,"sku":"ZS44U-5MM-ORG-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Gold","offer_id":45079730257964,"sku":"ZS44U-5MM-GLD-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Raw Silver","offer_id":45079730290732,"sku":"ZS44U-5MM-RSIL-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Upper \/ ZS44\/28.6 6mm Stack \/ Ultraviolet Purple","offer_id":45079730323500,"sku":"ZS44U-5MM-PRU-B","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Black","offer_id":45079730356268,"sku":"ZS56L-40-BLK-B","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Red","offer_id":45079730389036,"sku":"ZS56L-40-RED-B","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Blue","offer_id":45079730421804,"sku":"ZS56L-40-BLU-B","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Orange","offer_id":45079730454572,"sku":"ZS56L-40-ORG-B","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Gold","offer_id":45079730487340,"sku":"ZS56L-40-GLD-B","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Raw Silver","offer_id":45079730520108,"sku":"ZS56L-40-RSIL-B","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Lower \/ ZS56\/40 \/ Ultraviolet Purple","offer_id":45079730552876,"sku":"ZS56L-40-PRU-B","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/wolf-tooth-performance-zs-headsets-zero-stack-3278205.jpg?v=1772623454","url":"https:\/\/racycles.com\/es\/products\/wolf-tooth-performance-zs-headsets-zero-stack","provider":"RA Cycles","version":"1.0","type":"link"}