Dunlop brake size codes

[pheaney]

Hi does anyone know the piston sizes relating to the Dunlop brakes stamped 21 and 22.
Thanks Paul

[pheaney]

I found the answer on the Omicron site :-


The size of rear wheel cylinders is cast into the body, and is a number that refers to the diameter of the bore in 1/16 increments.

e.g. 19 = 19/16 = 1 3/8" and 21 = 21/16 = 1 5/16" etc

[Richard Fridd]

From a manual