Sealed Bearings

THE UPPER BEARING FOR AN ACROS AI-70 HEADSET USED ON CANYON BIKES
NOTE, These do not fit Canyon Ultimate CF SLX 2016 onwards - you will require bearings AC3544 (upper) and AC3344 (Lower)

Inner x Outer x Depth (mm): 35 x 44 x 5
Inch Dia: 1 - 1 / 4
Angle / Chamfer: Non
AKA: 61707 - 2RS

Note: Our primary stock has a black oxide coating at no extra cost. If stock is running low of this version we will substitute it for standard silver chromium finish bearing.

Fits: Canyon/Acros Aeroad SLX, same as AC3344
(Lower Bearing for SLX Models after 2016)
Also known as: AC3344

Used On: 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

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

Fits: Canyon/Acros Aeroad SLX, same as AC3344
(Lower Bearing for SLX Models after 2016)
Also known as: AC3344

Used On: 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

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

Note: Our primary stock has a black oxide coating at no extra cost. If stock is running low of this version we will substitute it for standard silver chromium finish bearing.

Fits: Canyon/Acros Aeroad SLX, same as AC3544
Upper Bearing for SLX Models after 2016 - Also known as: AC3544

Used On: 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

See main description for more detail.

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

Fits: Canyon/Acros Aeroad SLX
Upper Bearing for SLX Models after 2016 - Also known as: AC3544

Used On: 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

See main description for more detail.

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

LOWER BEARING FOR TREK MADONE 2011 ONWARDS & TREK DOMANE (ENDURO BEARING)
Also known as: ACB 6808 SS, ACB4051K SS, MR006
See ACB4051KK-BO as alternative, which is same size but with black oxide (BO) coating.

Inner x Outer x Depth (mm): 40 x 51 x 6.5
Inch Dia: 1 - 1 / 2"
Angle / Chamfer (Deg): 36 / 36
Material: Stainless Steel

Part Number chaged from ACB49H6.5K, and now called ACB37489H6.5K-BO
BO= Black Oxide (corrosion resistant coating)

FITS CERVELO ROAD BIKES - LOWER BEARING
& TREK MADONE UPPER BEARING (Trek Part W513538)

ALSO KNOWN AS: ACB49H6.5K, MR031, 160-6753, IS-2-138, ACB6806CC, HD 1446 K

Inner x Outer x Depth (mm): 37 x 48.9 x 6.5
Inch Dia: 1-3/8”
Angle / Chamfer (Deg): 36 / 45

Inner x Outer x Depth (mm): 40 x 49 x 6
Angle / Chamfer (Deg): 45 / 45
Note: Fits Van Rysel road bike 2023-2024

LOWER BEARING FOR TREK MADONE 2011 ONWARDS & TREK DOMANE
Same size as: ACB3636-150S, ACB 6808 SS, ACB4051K SS, MR006
Equivalent to Trek Part: W540243

Inner x Outer x Depth (mm): 40 x 51 x 6.5
Inch Dia: 1 - 1 / 2"
Angle / Chamfer (Deg): 36 / 36
Material: Steel with Black Oxide Finish

Note: the black oxide finish provides a corrosion resistance surface

Used on Roubaix, Ruby and Diverge 2017 Models onwards using Future Shock Headset (equivalent to Specialized part refs: S182500006 & S172500014)

Inner x Outer x Depth (mm): 36.8 x 45.8 x 6.5

Angle / Chamfer (Deg): 45/45