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.
- Designed to work with Trek's Knock Block system
- The top cap on these headsets have unique raised features that key to Knock Block compatible stems (made by Bontrager
- If spacers are needed, you will need to use special Knock Block compatible spacers with notch features
- This product is the upper headset only
- Lower headsets on bikes with Knock Block do not have any unique features. They are usually IS headsets which are available separately
Manufacturer Wolf Tooth
Manufacturer Part Number IS41U-8MM-KNOCK-BLU
UPC 810006802696
Model Wolf Tooth Knock Block Headset Upper
Bearing Type
Cartridge
Color
Blue
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Trek Knock Block
Upper Stack Height
8
S.H.I.S. Stem Clamp Diameter
28.6 Threadless
Usually Ships in 2-3 Days
Please Note: This product is usually available for shipment within 2 business days for orders placed before 3pm EST, Monday through Friday or within 3 business days for orders placed after 3pm EST, Monday through Friday. Contact for in-store availability, not all items are available for immediate pickup. If we are unable to meet these time frames due the rapid changes in revolving inventory you will be contacted via email. We do not partial ship orders, the delivery time of your order is determined by the item on your order with the longest lead time. If your order is time sensitive we encourage you to contact us for up to the minute product availability and ship times to verify that we can accommodate your needs. Refer to our Shipping Terms for more information.
Please Note: This product is usually available for shipment within 2 business days for orders placed before 3pm EST, Monday through Friday or within 3 business days for orders placed after 3pm EST, Monday through Friday. Contact for in-store availability, not all items are available for immediate pickup. If we are unable to meet these time frames due the rapid changes in revolving inventory you will be contacted via email. We do not partial ship orders, the delivery time of your order is determined by the item on your order with the longest lead time. If your order is time sensitive we encourage you to contact us for up to the minute product availability and ship times to verify that we can accommodate your needs. Refer to our Shipping Terms for more information.