Wolf Tooth IS41 Upper Knock Block Headset Black 28.6mm

Wolf Tooth Precision Headsets 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.

Now available for Knock Block equipped frames without sacrificing the benefits of Knock Block technology!

• Upper headset assembly compatible with Trek Knock Block 58-degree headset system
• Not for use with standard headset system or 62-/ 72-degree Knock Block headset systems
• Includes color-matched Knock Block top cover and ultralight stem cap with integrated 5mm headset spacer
• Includes enduro sealed upper bearing, aluminum stem cap bolt, and star nut
• Does not include Knock Block frame chip
• O-ring seal prevents water intrusion around the steerer tube
• Custom molded upper lip seal provides additional protection for upper bearing
• 7075 aluminum, made in USA