Can I replace just one headset bearing?

You can, but best practice is to replace both upper and lower headset bearings simultaneously. Mismatched wear between new and old bearings can cause uneven steering feel.

Do I need a headset press for installation?

Yes — a headset press is required to seat the bearings properly in the head tube cups. Improvised installation risks tilting the bearing and damaging the head tube.

Is this compatible with integrated (IS) headsets?

This depends on your headset cup geometry. The ACB 4545 1125 BO is designed as a bearing cartridge — compatibility with your specific headset cup design should be confirmed against your frame and headset manufacturer's documentation.

Enduro Bearings

Enduro Bearing ACB 4545 1125 BO- 1-1/8 Black Oxide Coated Angular Contact Headset Bearing

Name: Enduro Bearing ACB 4545 1125 BO- 1-1/8 Black Oxide Coated Angular Contact Headset Bearing
Brand: Enduro Bearings
SKU: ACB-4545-1125
Price: 1799.00 INR
Availability: InStock
Author: InstaSport Editorial

₹1799.00

Description

ACB 4545 1125 BO - 1-1/8" Black Oxide Angular Contact Headset bearing (30.5mm x 41.8mm x 6.5mm: 45x45 deg) Angular-contact headset bearing featuring anti-corrosion Black oxide/Magnetite coated 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating provides an extra le