Wolf Tooth Headset Upper Knock Block – 28.6 8mm Black. Wolf Tooth Precision Headsets for Trek Knock Block are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements. Available in a variety of colors to add some style to your bike. These upper headsets are for Trek frames with molded-in internal bearing cups.
- TECH SPECS
| Bearing Type | Cartridge |
| Color | Black |
| keyword search | Trek Knock Block |
| Upper Stack Height | 8 |
| S.H.I.S. Stem Clamp Diameter | 28.6 Threadless |
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Product images are for reference only and may not reflect the exact specifications, color, or components of the item offered for sale. Please refer to the product description and specifications for the most accurate details. If you have questions before purchasing, contact us, and we’ll be happy to confirm.








