Topic: Rocky Mountain brake drums


Sneezer    -- 02-06-2025 @ 5:07 PM
  I have a 35 Ford with the "Rocky Mountain" brake drums. Can anyone tell me the maximum inside diameter before they are not to be used. Mine are between 12 1/8th and 12 3/16.Any help would be appreciated.


kubes40    -- 02-06-2025 @ 5:16 PM
  12.060" is the limit. Many guys use them well beyond that.

Mike "Kube" Kubarth


pauls39coupe    -- 02-07-2025 @ 4:40 PM
  Your drums are 12.125 to 12.187? Sounds like they are too thin already. They will be hard to fit shoes and there is not much metal left to get rid of the heat.
I would look for some closer to 12".


CharlieStephens    -- 02-07-2025 @ 10:00 PM
  I believe that the 12.060 is actually a legal limit (unless otherwise marked). Ask at a local brake shop. If you have an accident and they suspect the brakes they will disassemble the brakes and check them. A position you don't want to be in. Put your general location in your profile, someone nearby (who doesn't want to ship) may have a pair to sell.

Charlie Stephens

This message was edited by CharlieStephens on 2-7-25 @ 10:02 PM


Sneezer    -- 02-08-2025 @ 4:07 AM
  Thanks for the replies. I am currently in contact with a party in Illinois that relines brake drums to bring them back into specifications. his firm relines the Pontiac 8 lug drums and Model A drums. He may be able to do mine. I'll let you know if this is possible with mine,


kubes40    -- 02-08-2025 @ 6:10 AM
  That place does beautiful work. Kinda pricey but what is safety worth to you?

Mike "Kube" Kubarth


51504bat    -- 02-08-2025 @ 11:02 AM
  Link
J&G Brake relining McHenry IL. 815-276-2578.
https://www.jgrelining.com/



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Sneezer    -- 02-08-2025 @ 4:59 PM
  My brakes work fine but am running out of adjustment. Currently use Flathead Ted's kit.


Sneezer    -- 02-09-2025 @ 12:54 PM
  Pricey is an understatement. $375 to $475 PER DRUM. Anyone have any drums? They need to be at least a 1/4 thick at outer edge.


carcrazy    -- 02-09-2025 @ 3:06 PM
  At those prices, you might want to think about converting the brakes to use drums from a later model year vehicle.


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