Bearing Kits

AI52/Ai52 Upper Headset Bearing, Note the lower bearing is our part ref 'P16'

Inner x Outer x Depth (mm): 42 x 52 x 7
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 45 / 45
Note: Same fit as Acros AC4252

Note, this is an information resource page to assist you in purchasing the correct bearings for your FSA Headset. 

For every FSA Headset where known, we list  below the FSA original part number, along with a Kinetic alternative. 

Click 'learn more' to see table

Headset Bearing Kit: 2 x Bearings (Upper & Lower) to fit to fit Acros AiX336 Headset. Often found on Orbea Bikes

Headset Bearing Kit: 2 x Bearings (Upper & Lower) to fit headset on Cervelo C3 and C5.

This bearing kit consists of 2 x replacement sealed bearings to fit the upper and lower cups of a FSA No.44E Headset.

This bearing kit consists of 2 x replacement sealed bearings to fit the upper and lower cups of a FSA FSA Orbit 1.5 ZS (No.57) Headset.

This bearing kit consists of 2 x replacement sealed bearings to fit the upper and lower cups of a FSA FSA Orbit 1.5E (No.57E) Headset.

2 x Bearings (Upper & Lower) to fit Giant Overdrive (OD) Mountain Bike.

2 x Bearings (Upper & Lower) to fit Giant Overdrive2 Headset (OD2) for a Mountain Bike

2 x Bearings (Upper & Lower) to fit headset on Scott Foil 2016 Onwards