Never heard of 2 1/4 backing plates.
Either the shoes were 2" 2 1/2" or 3" for 11 inch brakes.
Drums & backing plates are used together, for whichever shoe size.

Last edited by hemi71x; 09/21/11 12:23 AM.
RF-4C Phantom 69-370 Zweibrucken, Germany