Sealed Bearings

ACB30418K Headset Bearing

Found in 'some' Acros Headsets

Inner x Outer x Depth (mm): 30.1 x 41.8 x 8
Inch Dia: 1-1/8”
Angle / Chamfer (Deg): 36 / 45

Inner x Outer x Depth (mm): 35 x 47 x 8
Inch Dia: 1 - 1 / 4”
Angle / Chamfer (Deg): 45 / 45
Material: Chrome Steel 100Cr6 (Race & Balls)

Believed to be used on Venge frame 2016 Onwards. If in any doubt, please check dimensions of current bearing for comparison.
Note, older Venge frame upto 2015, see part number MH-P08F for upper bearing

Inner x Outer x Depth (mm): 35 x 45.3 x 7.3
Inch Dia: 1 - 1 / 4”
Angle / Chamfer (Deg): 45 / 45

Direct equivalent to FSA/TH Industries MR019
Inner x Outer x Depth (mm): 40 x 51.8 x 7.5
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 36 / 45

Often ordered in error instead of ACB518K, which has almost same dimensions, and only varies by internal chamfer angle. This one has a 45 deg inner chamfer, whereas the ACB518K has an internal chamfer of 36 deg. 
Note, ACB518K is ALOT more popular, so if you unsure, it'll probably be ACB518K you require.

Inner x Outer x Depth (mm): 40 x 51.8 x 8
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 45 / 45
Note: Equivalent Part ref PT-R425, P28

THE MOST POPULAR LOWER 1 - 1 / 2" BEARING - CANE CREEK FIT

ALSO SEE 'TH073' FOR THE FSA DIRECT ALTERNATIVE IF OUT OF STOCK

Equivalent Part Ref: MR110, MR010, MR127, TH-073, TK518B, MH-P28K

Inner x Outer x Depth (mm): 40 x 51.8 x 8
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 36 / 45

THE MOST POPULAR LOWER 1 - 1 / 2" BEARING - CANE CREEK FIT
Stainless version of ACB518K

Equivalent Fit Part Ref: MR110, MR010, MR127, TH-073, TK518B, MH-P28K (These are all chromium versions, but this product is Stainless)

Inner x Outer x Depth (mm): 40 x 51.8 x 8
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 36 / 45

RITCHEY FIT  & Scott Foil 2016 Onwards Lower bearing

Inner x Outer x Depth (mm): 40 x 51.9 x 8
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 45 / 45
Material: Chrome Steel 100Cr6 (Race & Balls)

Inner x Outer x Depth (mm): 40 x 51.9 x 8
Inch Dia: 1 - 1 / 2"
Angle / Chamfer (Deg): 45 / 45
Material: Stainless Steel
Grease: Mobil XHP-222 or SINOPEC HTHS Bearing Grease
Seal:  1RS

Inner x Outer x Depth (mm): 46 x 60 x 8
Angle / Chamfer (Deg): 45 / 45