{"product_id":"wolf-tooth-headset-upper-hdst1702","title":"Wolf Tooth Premium Zero Stack ZS44 - 28.6mm Headset | Aircraft-Grade Aluminum, Stainless Steel Bearings \u0026 Waterproof Seals for Enduro \u0026 Trail Riding","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eIntroducing the Wolf Tooth Premium ZS Headset - Zero Stack Upper A designed for cyclists seeking durability, precision, and style. Crafted with meticulous attention to detail in our Minnesota workshop, this head tube component is engineered to enhance your bike's performance across all terrains, from rugged trails to everyday commutes.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003ePremium Materials \u0026amp; Engineering\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eConstructed from aerospace-grade 6061 aluminum, the Wolf Tooth ZS Headset offers an unbeatable combination of lightweight strength and durability. The CNC-machined components ensure tight tolerances for a perfect fit, while the corrosion-resistant stainless steel bearings guarantee smooth operation and longevity, even in wet or muddy conditions.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003eInnovative Components \u0026amp; Technology\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eEquipped with industry-leading sealed bearings, our headsets offer three levels of custom sealing- including dual-lip and upper lip seals- protecting against water, dirt, and debris. The sealed bearings are rated for a lifetime of reliable performance, backed by our lifetime warranty. The ultralight stem cap features an integrated spacer, aluminum bolt, and star nut (compatible with steel or aluminum steerers), simplifying installation and adjustments.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eOptimized Performance \u0026amp; Compatibility\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eDesigned for frames with internal bearing cups pressed into the head tube, specifically ZS (Zero Stack) headsets with 44mm upper and 56mm lower inner diameters. Available in various stack heights (6mm, 15mm, 25mm) to fine-tune fit and handling. The upper assembly includes a custom-molded lip seal and an O-ring to prevent water intrusion, while the lower assembly features a dual-lip seal on the crown race for added protection in challenging conditions.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003eFinished in sleek black, the Wolf Tooth ZS44\/28.6 25mm Stack Headset complements any bike aesthetic-from aggressive trail rigs to sleek commuter bikes. Perfect for riders who demand durability, water resistance, and precise steering, especially in wet climates or muddy environments. Whether you're upgrading your existing setup or building a new bike, this headset provides reliable performance for all riding disciplines.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eUnique \u0026amp; Differentiating Features\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Machined in the USA from aircraft-grade 6061 aluminum for premium quality\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Stainless steel sealed bearings with a lifetime warranty for corrosion resistance and longevity\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Three stack height options for tailored fit and geometry\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- O-ring and custom lip seals for superior water and debris protection\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Compatible with both steel\/aluminum and carbon steerers (star nut included; compression plug sold separately)\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003e- Easy installation with the Wolf Tooth crown race installation adapter and precision spacers\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-17\"\u003e\u003cp\u003eUpgrade your bike's steering accuracy and durability with the Wolf Tooth Premium ZS Headset - the perfect choice for discerning cyclists looking for unparalleled quality, performance, and style.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-18\"\u003e\u003cp\u003eTechnical Specs\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-19\"\u003e\u003cp\u003e- Weight: 55-58g\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-20\"\u003e\u003cp\u003e- Material: 6061 aluminum\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-21\"\u003e\u003cp\u003e- Bevel Angle: 36 x 45\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-22\"\u003e\u003cp\u003e- Compatibility: ZS44\/28.6 upper head tube, 44mm inner diameter\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-23\"\u003e\u003cp\u003e- Warranty: Lifetime on bearings\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-24\"\u003e\u003cp\u003e- Made in the USA\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-25\"\u003e\u003cp\u003eEnhance your ride's performance and reliability today with Wolf Tooth's industry-leading headsets designed for serious cyclists who demand the best.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eEngineered from aircraft-grade 6061 aluminum, Wolf Tooth Premium ZS Headsets offer superior strength and lightweight durability, ensuring long-lasting performance on rugged trails and daily rides. \u003c\/li\u003e\n\u003cli\u003eDesigned for ZS (Zero Stack) head tubes with 44mm upper and 56mm lower inner diameters, these headsets ensure a precise fit for a wide range of mountain and gravel bike frames. \u003c\/li\u003e\n\u003cli\u003eEquipped with industry-leading Enduro stainless steel sealed bearings, these headsets provide exceptional corrosion resistance and smooth operation, especially in wet, muddy, or sweaty riding conditions. \u003c\/li\u003e\n\u003cli\u003eFeaturing an innovative triple-seal system-custom-molded upper lip seal, dual-lip crown race seal, and O-ring coverage-these headsets deliver optimal water and dirt protection to prolong bearing life. \u003c\/li\u003e\n\u003cli\u003eWith multiple stack height options (6mm, 15mm, 25mm), integrated ultralight stem cap with spacer, and a sleek black finish, Wolf Tooth ZS headsets combine style and versatility for the modern rider seeking performance and durability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Wolf Tooth","offers":[{"title":"Default Title","offer_id":42867642007619,"sku":"HDST1702","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/WT-ZS44U-25MM-BLK-01.jpg?v=1773486077","url":"https:\/\/365cycles.com\/products\/wolf-tooth-headset-upper-hdst1702","provider":"365 Cycles","version":"1.0","type":"link"}