Boardman MTR Headset Bearing Kit AC3544 42 ORBIT C-40 1-1/8" to

42 ORBIT C-40 1-1/8" to 1

Lower Bearing - MH-P25K

For Felt Broam/Breed/Doctrine Bikes

For Cervelo R5 2021 & RX Bikes

Boardman MTR Headset Bearing Kit AC3544 42 ORBIT C-40 1-1/8" toThis listing includes both the upper and lower headset bearings, two bearings included in sale. For Boardman MTR Bikes, all model years Upper Bearing MH P08F ? 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