Wolf Tooth Precision Headsets are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements. These ZS headsets are for frames with internal bearing cups that are pressed into the frame. Enduro stainless steel sealed bearings. Signature 5 mm integrated spacer plus stem cap with an aluminum bolt and a star nut. O-ring seal prevents water intrusion around the steerer tube. Custom molded upper lip seal provides additional protection for upper bearing. Item Specifications: Bearing Type, Cartridge, Color, Black, Upper Stack Height, 6mm, S.H.I.S Upper, ZS44, S.H.I.S. Stem Clamp Diameter, 28.6 Threadless,

Wolf Tooth Premium ZS Headset - Zero Stack, 6061 Aluminum, Stainless Steel Bearings

Reference Number: 5S07O4

Upgrade your bike's performance and durability with the Wolf Tooth Premium ZS Headset - Zero Stack Upper ZS44/28.6 6mm Stack in sleek black. Crafted with precision in the USA, this high-quality headset is engineered for riders who demand reliability, lightweight strength, and seamless integration in all riding conditions.

Materials & Construction:

Made from aircraft-grade 6061 aluminum, the Wolf Tooth ZS Headset combines exceptional strength with lightweight durability. The precision-machined components ensure a perfect fit and lasting performance. The stainless steel cartridge bearings deliver unmatched corrosion resistance, making this headset ideal for wet, muddy, or sweaty environments.

Performance & Engineering:

Designed for zero stack (ZS44/28.6) frames with internal bearing cups pressed into the frame, this headset features industry-leading sealing systems. The custom-molded dual-lip lower seal and upper lip seal protect bearings from dirt, water, and debris, thereby extending the lifespan of your headset. The O-ring around the steerer tube adds an extra layer of water resistance, ensuring smooth performance in challenging conditions.

Components & Technology:

Includes Enduro stainless steel sealed bearings for a lifetime warranty, guaranteeing long-term reliability. The ultralight stem cap with integrated spacer offers adjustable stack heights of 6mm, 15mm, or 25mm, allowing for customization to optimize your bike fit and handling. An aluminum bolt and star nut are included for easy installation, with options tailored for steel or aluminum steerer tubes (note: carbon steerer forks require a compression plug sold separately).

Style & Use Case:

Available in classic black, this headset complements a wide range of bike styles-from mountain bikes to gravel and commuter bikes. Its sleek, low-profile design enhances aesthetics while providing a secure connection between fork and frame. Perfect for riders seeking a reliable, sealed bearing headset that can withstand the elements and deliver exceptional steering precision.

Innovative & Differentiating Features:

- Industry-leading sealing system with custom-molded lip seals for superior water and dirt protection

- High-quality stainless steel bearings with lifetime warranty for corrosion resistance and longevity

- Precision-machined from aircraft-grade aluminum in-house, ensuring top-tier quality control

- Multiple stack height options for tailored fit and optimal riding posture

- Compatible exclusively with ZS44/28.6 head tube standards, maximizing stability and compatibility

Specifications:

- Upper Stack Height: 6mm

- Bearing Type: Sealed Stainless Steel Cartridge Bearings

- Color: Black

- Compatibility: ZS44/28.6 frames with pressed-in internal bearing cups

- Weight: 55-58g

Elevate your bike's steering precision, reliability, and style with the Wolf Tooth Premium ZS Headset-built for serious riders who demand the best. Backed by a lifetime warranty and crafted right here in the USA, this headset is your upgrade for lasting performance in all conditions.

  • Premium ZS44/28.6 headsets built from aircraft-grade 6061 aluminum provide an optimal balance of lightweight strength and durability, ensuring long-lasting performance on demanding rides.
  • Engineered with industry-leading triple-seal technology, including custom-molded lip seals and O-ring water barriers, these headsets offer superior protection against water, mud, and debris for enhanced bearing longevity.
  • Equipped with high-quality Enduro stainless steel sealed bearings, these headsets deliver smooth steering and corrosion resistance, backed by a lifetime warranty for peace of mind on every ride.
  • Designed for versatile zero stack frames with internal bearing cups, compatible with both steel and aluminum steerer tubes, featuring an ultralight stem cap and adjustable stack height options for personalized setup.
  • Innovative features such as a precision-machined crown race installation adapter and integrated spacers make installation straightforward and ensure optimal compatibility with a variety of cycling setups, from mountain to gravel bikes.
Item Specifications
Upper Stack Height6
S.H.I.S UpperZS44
S.H.I.S. Stem Clamp Diameter28.6
ColorBlack
Bearing TypeCartridge
Bearing TypeStainless Steel
Upper/LowerUpper
S.H.I.S. Stem Clamp DiameterZS44/28.6
ColorBlack
Model NamePremium Upper
Stack6mm

Why 365 Cycles?

365 Cycles is an Authorized Wolf Tooth Dealer, and we offer the Full Wolf Tooth Warranty!

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365 Cycles delivers all your cycling needs fast! We don't waste time preparing your order. Our priority is to serve our customers first and foremost. If you need help picking the right product, have questions about bike component compatibility, or just want to geek out about bikes we are here 7 days a week! Simply put, we are bike experts from dirt to tarmac and want to make sure you get the full 365 Cycles experience when you shop with us.

At 365 Cycles our mission is to simplify the shopping experience. We want to get you the right product in a quick time frame and be here if you need help with questions, warranty, friend to talk to, etc.

We’re dedicated to building lasting relationships with our customers, communities, and team members. We combine the knowledge and service of a traditional bicycle shop with the convenience of shopping in your own home.





Shipping & Handling

Most orders placed during the workweek before 1:30 pm EST ship the same day, but in rare cases (peak season/holiday periods) handling time can take up to 48 hours. If you have questions regarding shipping estimates, please let us know prior to placing your order. There is a direct signature requirement for all orders over $500.

Please allow 1-2 business days for your order tracking to update.

  • Cut off for SAME DAY SHIPPING- 1:30 pm EST Monday - Friday
  • Friday afternoon -Sunday orders ship the following Monday
  • Due to carrier restrictions orders shipped to: PO Box, HI, AK, & PR 365 Cycles may use a comparable service to what was selected.

Combined Shipping Discounts

To offer customers savings on shipping, we offer discounts when shipping multiple items from our store. We cannot issue refunds on shipping once an order is finalized so please follow the 5 steps below and ask if you are having trouble with the discount before you make a purchase.

  1. Be sure you are using the US site: https://www.ebay.com
  2. Select Add to Cart (instead of Buy It Now) with items from our store 365Cycles
  3. Click on Proceed to Checkout. On the checkout page, the shipping service on each line item needs to match
  4. Compare First Class vs Priority as sometimes Priority can be cheaper and it gets to you faster!
  5. You’ll need to change the shipping method to Priority on every item in your cart before the rate can be calculated.

Returns

365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.

Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.

Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.

If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!

Exchanges

If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.



HD1724 .

Company Details

365 Cycles
1180 Enterprise Rd
East Petersburg, PA 17520
United States

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