Identification Of Bore Sizes

laser marking

All AP Racing master cylinders have their part number, nominal bore size laser marked on the body together with batch codes. This allows full manufacturing traceability. All master cylinders also have a coloured tie wrapped aroung body for quick visual identification of bore size.

The tables below show the bore size colour identification for push type cylinders and pull type cylinders.

Colour Identification for Push Type Cylinders
Colour
Bore Size
Black/Orange
14mm (0.551")
Black/Red
15mm (0.590")
Black

15.9mm (0.625") 5/8"

Black/Yellow
16.8mm (0.661")
Blue

17.8mm (0.70")

Green

19.1mm (0.75") 3/4"

Orange

20.6mm (0.812") 13/16"

Red

22.2mm (0.875") 7/8"

White

23.8mm (0.937") 15/16"

Yellow

25.4mm (1.00")

 

Colour Identification for Pull Type Cylinders
Colour
Bore Size
Black/Red
14.9mm (0.587")
Black

16.2mm (0.638")

Blue

17.3mm (0.681")

Green

18.8mm (0.740")

Orange

20.2mm (0.795")

Orange/Red

21.2mm (0.834")

Red

21.8mm (0.858")

Red & White 22.4mm (0.882")
White

23.7mm (0.933")

Yellow

25.4mm (1.00")