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