High-quality replacement headset bearings are smooth like butter. - Sealed cartridge bearing for long life - Durable steel bearing housing

Service and replacement parts specifically for Trek Knock Block technology. Genuine replacement parts Get your bike back on the trail with the headset parts you need. - Trek proprietary headset components compatible with Trek Knock Block models - 58-degree headset fits all 2017-2020 Knock Block equipped models - Includes crown race, bearings, top cover, frame chip & fastener - Frame chip has display tabs to connect Bosch Kiox Mount sold separately - Must be paired with Knock Block stem and Knock Block spacers - Knock Block headset spacers not included

Origin-8's SSR Threadless Headset is for 1 1/8-inch threadless forks. It features CNC machined 7075-aluminum cups and stainless-steel cartridge bearings for excellent performance and long life. It also comes in many colors to customize your ride. - 93g including star nut and laser top cap - Stack Height: 28.5mm **Anodized colors will vary from batch to batch and may not match exactly - S.H.I.S.: EC34/28.6|EC34/30

- 3-piece expander design provides a secure fit within carbon steerer tubes - 22-25mm range of expansion - 50mm height reinforces carbon steerer tube beneath the stem - New design evenly distributes headset compression forces - Lightweight AL6061 alloy construction - Stainless steel bolt

This is the Top Cover for the Cane Creek 40 Series ZeroStack headset. Please contact us if you have any questions about which parts are correct for your headset.

• Steel • Retainer ball bearings, includes top cap and star nut • 1 1/8 inch • S.H.I.S.: EC34/28.6, EC34/30

Lightweight aluminum alloy - Non-Keyed - Height: 20mm - 10 to a bag

FSA ACR (Aerodynamic Cable Routing) Headsets are suitable for both road and MTB riding styles and feature angular contact bearings. - A fully integrated cable routing - No rotation limit - ACR top cover - Angular contact bearing - Specific frame required - 1.5" headtube - 36°/45° ACB - For 55.8mm OD headtube - For 1-1/8" to 1.5" tapered fork - Stack height 10.4+0.5=10.9

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our headsets have three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Lower assembly features: - Custom molded dual-lip seal on the crown race to protect the lower bearing in the toughest conditions. - 12.25mm stack. - Service and additional parts available.

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our headsets have three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Lower assembly features: - Custom molded dual-lip seal on the crown race to protect the lower bearing in the toughest conditions. - 12.25mm stack. - Service and additional parts available.

The 40-Series is the workhorse of Cane Creek's headset line-up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long-lasting headset. Zero stack uppers press into head tube with very little stack height. Lowers are either zero stack or external cup. - Sealed black oxide bearings - Carbon-friendy compression ring captured in top cover, keeping shims in place - Steel crown race with integrated seals - Interlok spacer compatible - Compatible with tapered 1-1/8" to 1-1/2" steerer tubes, or straight 1-1/8" steerers with a conversion crown race (sold separately)

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our Performance Headset is built to include a black oxide-coated chromium steel bearing and a one-year warranty. Our headsets stand above the rest with three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Upper assembly features: - Ultralight Stem Cap With Integrated Spacer plus an aluminum bolt and a star nut. - 5mm top cover = 16mm total stack - O-ring seal prevents water intrusion around the steerer tube. - Custom-molded upper lip seal provides additional protection for the upper bearing.

Hellbender 70 Slam Top Assembly headset.

ABI Headset Bearing for new builds or replacements.

Why We Make This Headtube and fork steerer standards have proliferated in recent years, but for a long, long time these variables were more fixed, so we made thousands upon thousands of NoThreadsets™ to serve bikes with unthreaded fork steerers. We made them in a variety of diameters, and everyone was happy in the land. We still make it, because it’s still a great headset for all those bikes that are still rolling through the world with a headset that will never die. Why You Want It For decades our NoThreadSet™ set the standard for quality headset function delivering precision performance to numerous world champions, grand tour winners, and aspiring riders around the world. Every Chris King headset is built with our heat-treated bearings, and surgical-grade steel races machined simultaneously to ensure they are perfectly matched. As Chris King bearing tracks age and burnish, they actually get smoother, and all headsets are fully serviceable for years upon years of demanding riding. - Engineered, manufactured and assembled in Portland, Oregon USA - King Lifetime Warranty - Legendary made-in-house bearings - Patented GripLock® retention design for dependable headset adjustment (US Patent 8662517) (1-1/8” only) - Available in 8 beautifully anodized colors in both bold and sotto voce marking options - Responsibly lightweight - Options to fit 1” and 1-1/8” straight steerer tubes

Wolf Tooth headsets are machined here in our Minnesota shop with aircraft-grade 6061 aluminum. They are designed to be lightweight, strong, and durable. Performance Headsets with Enduro black oxide bearings have a one-year warranty. 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. Lower assembly features: - Custom-molded dual-lip seal on the crown race protects lower bearing in the toughest conditions. - All components are precision machined in-house at Wolf Tooth from aircraft-grade aluminum to ensure the highest level of quality. - Service and additional parts available.

Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek headsets. The 40 Series has light, tough, and beautiful machined 6061 T6-aluminum cups that are internally relieved for even more gram shaving. You also get Cane Creek's corrosion-resistant black-oxide sealed bearings and quality seals throughout to keep the grease in and the dirt out, including Cane Creek's Clip Seal that completely seals the top assembly.

Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek headsets. The 40 Series has light, tough, and beautiful machined 6061 T6-aluminum cups that are internally relieved for even more gram shaving. You also get Cane Creek's corrosion-resistant black-oxide sealed bearings and quality seals throughout to keep the grease in and the dirt out, including Cane Creek's Clip Seal that completely seals the top assembly.

Crown races for Cane Creek headsets fit a variety of lowers and crown race seat diameters. - Compatible with 10-, 40- and 110-Series headsets and backwards compatible with S and XX Series - Integral mold seals keep out the elements - Durable steel construction

Genuine replacement parts Get back on the road with a genuine replacement headset. Designed for use with internal cable routing - Includes lower and upper bearing - Includes headset compression ring - Compression ring is stackable with Allant+ 9.9 / Zouma Supreme+ Top cap and Spacers

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our Performance Headset is built to include a black oxide-coated chromium steel bearing and a one-year warranty. Our headsets stand above the rest with three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Lower assembly features: - Custom molded dual-lip seal on the crown race to protect the lower bearing in the toughest conditions. - 12.25mm stack. - Service and additional parts available.

- No. series headsets offer excellent performance and value - No. 8b: 36x45 degree Cane Creek Integrated, or No. 10: Zero Stack shallow available for 1-1/8" applications - No. 10 S.H.I.S.: ZS44/28.6|ZS44/30 - No. 8B S.H.I.S.: IS42/28.6|IS42/30 - Stack: 5.2mm/3.7mm (No. 10), 8mm/1mm (No. 8B) - Color: Black - Weight: 93g (No. 10), 74g (No. 8B)

FSA Standard Headset Bearings

ABI Headset Bearing for new builds or replacements.

Headset bearings for Wolf Tooth headsets. - Replacement bearings

- Forged steel cups with caged 5/32" ball bearings - TH-857 features a alloy top cover - TH Series: External Cup, traditional - S.H.I.S.: EC34/28.6|EC34/30 - Stack: 14.9mm/11mm - Color: Black - Weight: 126g

- Bearing Type: Cartridge - Weight: 125g - Crown Race: 40 - S.H.I.S. Lower: ZS56 - S.H.I.S. Upper: ZS44 - S.H.I.S. Stem Clamp Diameter: 28.6 Threadless

Cane Creek headsets with Hellbender stainless steel bearings with increased sealing elements and more grease in relation to the comparable 110 bearing. - Designed to bridge the gap between the 40-series and 110-series headsets

Origin-8's Pro Fit Threadless Headset is made of light and durable aluminum and boasts smooth and long-lasting sealed cartridge bearings. It also sports nice laser-etched logos.

A new headset gives you a new lease on life. This is the upper part of an integrated headset for a 44mm headtube. - Lower part of the headset sold separately