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
– 72-degree headset fits 2021 Slash 29
– 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