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

Acros compression ring for integrated cable routing

Acros Item code: 1152104

This Bearing 'set' consists of a lower stainless heasdset bearing inserted into a lower aluminium cup and supplied with a crown race. This is an original Acros product

Acros Part Ref: 44.02.700
ZS66/46/OD72
Stainless steel angular contact ball bearings

Key Features
• Weight: 70g
• Fork steerer: 1.8" (45.8mm)
• ⌀ Cup skirt: 66mm

2 x Bearings (Upper & Lower) to fit Canyon Headset on following Road Bikes - CF Aeroad, Ultimate or Endurance.

Equivalent to Canyon GP7172-01 Headset-Kit.

Note, on Canyon site they list the upper bearing as 31.6 x 44 x 6mm but this is incorrect, as this dimension with compression ring inserted.

NOTE, This does not fit Canyon SLX Models BEFORE 2016.
Used On: Carbon Fibre Canyon Bikes that run the AI-70 Headset on these Canyon Models after 2016 (R36 Endurace CF SLX, R39 Ultimate CF SLX, R28 Aeroad CF SLX) 

Refer to the Canyon web site for technical data for your year of bike if you are in any doubt if this is the correct Headset for your Canyon

Important to note: This is a Bearing 'set' which consists of an upper and lower heasdset bearing & compression ring. It is made by Acros. 

Upper Bearing (AC3544)
Inner x Outer x Depth (mm): 35 x 44 x 5.5
Angle / Chamfer (Deg): 36/45

Lower Bearing (AC3344)
Inner x Outer x Depth (mm): 33 x 44 x 6
Angle / Chamfer (Deg): 36/45

RRP £59.99
PART REF: GP7172-01

Used On: Canyon Bikes that run the AI-70 Headset (NOTE, This does not fit Canyon Endurance, Ultimate, Aeroad SLX 2016 onwards)
Refer to the Canyon web site for technical data for your year of bike if you are in any doubt if this is the correct Headset for your Canyon. 

This is a Bearing 'set' which consists of an upper and lower heasdset bearing & compression ring. 

Lower Bearing (AC3748)
Inner x Outer x Depth (mm): 37 x 48 x 7
Angle / Chamfer (Deg): One chamfer 45 Deg only on the inner side

Upper Bearing (6707-2RS)
Inner x Outer x Depth (mm): 35 x 44 x 5
Angle / Chamfer (Deg): Non

Alternative Non-Acros version of this bearing set

Used On: Canyon Bikes that run the AI-70 Headset (NOTE, This does not fit Canyon Endurance, Ultimate, Aeroad SLX 2016 onwards)
Refer to the Canyon web site for technical data for your year of bike if you are in any doubt if this is the correct Headset for your Canyon. 

This is a Bearing 'set' which consists of an upper and lower heasdset bearing & compression ring. 

Lower Bearing (AC3748)
Inner x Outer x Depth (mm): 37 x 48 x 7
Angle / Chamfer (Deg): One chamfer 45 Deg only on the inner side

Upper Bearing (6707-2RS)
Inner x Outer x Depth (mm): 35 x 44 x 5
Angle / Chamfer (Deg): Non

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 Ai69 Headset.

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