Trek proprietary headset components compatible with Trek Knock Block models.
Genuine replacement parts
Service and replacement parts specifically for Trek Knock Block Technology.
Manufacturer part # | IS-2-HBS/42/ACB |
Steerer outer diameter | 28.6mm (1-1/8") / 38.1mm (1-1/2") |
Crown race inner diameter | 39.8mm |
Cup Insertion OD | Integrated |
Stack height | 8.7mm |
Bearing type | Sealed |
Headset type upper | Unthreaded fully integrated |
Headset type lower | Fully integrated |
Material | Aluminium |
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Weights are based off pre-production products at time of publication. Weights may vary in final production.