10 inch drum backing plates

10x1.75 I think if I measured correctly
I believe they are 10 x 2 or greater.


photos are of A body 10 x 1.75 backing plate.


measure as in the photo and add 1.15 for A body and 1.35 for all else
PXL_20240710_195215327.jpg


The way you measured you have to hang the backing plate off a table so the e brake cable mount does not raise the plate up
PXL_20240710_195516156~2.jpg

This is what I get, about 1.35" for A body
PXL_20240710_195528615.jpg