brake drum sizing

[scipione2007]

I have a 68 charger, the rear drums, shoes and all hardware was gone when i bought the car. I think they are 11 inch (i compared them to a set of 10 inch) I measured the backing plate is 1 -3/4 inch
11 x 2-1/2 drums and shoes ( i think) 1. if i want 11 x 3 shoes and drums do i have to change the backing plates? 2. im not sure if the original had self adjusters "if" they had manual adjusters can i install self adjusters either way?
when i am done with the rear brakes ill post about the front brakes Thank you in advance for your help and advice

 

[toolmanmike]

Welcome. Your thread will be moved to the correct forum. The Welcome Wagon is for you to introduce yourself and show us your car(s).

 

[dadsbee]

There was never 3" wide pads on the rear axle..

 

[R/T Boy 67]

If your car had 11" brakes originally, they would be 11"x2 1/2" manual adjust. You can purchase the auto adjust hardware if that is what you want.

 

[khryslerkid]

And yes the backing plate dictates drum width and diameter.

 

[mobileparts]

As some have indicated above, it WILL be 11 " x 2 1/2 " on the Rear.......Verify, of course.......

Dadsbee , who is usually 100 % on the money , has forgotten , or not aware --- that there actually *** I S *** an 11 " x 3 " Rear --- which was on
Police Cars and Ambulances !!!

But, for you O P , you would need to find backing plates, at least , and maybe more --- so LEAVE IT AS IS, FOR SURE ......

If you need, I have *** N.O.S. *** U.S.A. made *** Brake Drums , *** Asbestos Brake Shoes *** , Rear Wheel Cylinders, all the Brake Hardware ---
Combi Kits and Adjuster Kits.....

P.M. me, as per forum rules, if interested.......Yours, Craig.....

 

[pnora]

I never take things for granted on a 50 plus year old car. Been wrong to many times. I would rather measure once and be right than to have a bunch of parts to return on my dime on a guess.

 

[Scott Kiger]

11x2.5” on the rear and 11x3” on the front of it was optioned with heavy duty brakes. No self adjusters but yes you can add them. Here is a pic of some I did for a 68 roadrunner that to finally came with manual adjusters