A single FSA ACB (angular contact bearing) headset cartridge bearing for 1 1/8 in headsets, with 36 degree by 45 degree contact angles and a black seal. FSA model MR122 (873E-RS).

What it's for

This is a replacement cartridge bearing for a 1 1/8 in headset that uses a 36 x 45 degree angular contact bearing. Angular contact bearings carry the steering load on angled faces, so the two angles have to match the seats in your frame or headset cup and the crown race or compression ring.

Compatibility

• How to check yours: Headset cartridge bearings are identified by inner diameter, outer diameter, height, and the two contact angles. Pull your old bearing and read the code stamped or etched on it, or measure it with calipers, and match all of those numbers before you order. OMG's bike shop can identify and install headset bearings.

Specs

• Type: ACB angular contact cartridge bearing
• Contact angles: 36 degrees x 45 degrees
• Headset size: 1 1/8 in
• Seal: black
• FSA model: MR122 (873E-RS)
• FSA part number: 160-0014000000
• Quantity: 1 bearing