I am having trouble figuring out the correct size trailer brake assembly for my new to me 72' Trail-Mite.
Its running ST175/80 R13 Tires
on 13 x 4.5 5 lug wheels.
The drums on the back have a square 4 hole plate for mounting. The drums themselves have a depth of 2.25" and a diameter of 7.5"
Measuring from the mounting plate to the back of the drum measures just under 2"
Is this an odd size drum and that's why I am struggling?