Trek Knock Block Headset Bearings Kit Bearing Quality:Stainless Steel For all Vitus Substance 2019-2023

For all Vitus Substance 2019-2023 Bikes

This does NOT fit the Substance VR2

This kit is for the Trek Fuel EX 9

For all Transition Relay 2023+ Alloy Bikes

Trek Knock Block Headset Bearings Kit Bearing Quality:Stainless Steel For all Vitus Substance 2019-2023For all bikes using the Trek Knock Block Headset Bearing Kit Both the upper and lower headset bearings, two bearings included in sale. Upper Bearing MH P03K Lower Bearing ACB518K GCR15 High Carbon Chromium Bearings: Chromium offers a corrosion resistance to the bearing, allowing you to get more use out on the trails and less time in the workshop changing bearings again due to rust and seizing. Buna NitrileRust Resistance Seals: Prevents moisture