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8" or 9" Drums how to tell the difference

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  • 8" or 9" Drums how to tell the difference

    I am in need of a rear brake job and i am having a hard time determining the drum size with out removal and measuring the inner diameter.
    I have measured the exterior of the drum and it is about 9.5-9.75". But as you know measuring the exterior can be different based on the manufacture and how thick they cast the wall.

    Is there any verification on the drum to determine 100% what size they are?
    2000 Black SVT with 114k Build # 1598 1\14\2000 Parting Out
    1998 SE with 99K Daily Driver
    98.5 Black SVT with 47k miles Build #5683 Born on 4\15\1998 crashed... fixing
    2002 Jeep Wrangler X 3" lift with 33 by 12.5

  • #2
    If you have the vin, a dealership might be able to tell you.
    *CLICK HERE ---> 1995 SE 3L WITH MATCHING TRAILER <--- CLICK HERE*
    30 Contour / Mystiques and counting......

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    • #3
      Originally posted by blu_fuz View Post
      If you have the vin, a dealership might be able to tell you.
      According to BAT: Rear drum equipped 1995-96 cars are equipped with 203 x 38mm (8")
      rear drums, but 1997-2001 cars are a mix of the 203 x 38mm (8") and larger 228 x
      45mm (9") drums. his is probably a manufacturing supply issue when the cars
      were built and the only way to determine which rear drum/shoe set is on you
      car is to check before ordering parts.

      Wikipedia Ford Mondeo posting - North America got an SE "Sport" Version of the Contour, which featured exclusive wheels and the coveted 9" Sport Drum rear brakes.

      Wonder if this is true, only the SE models had the 9" rear drums?

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      • #4
        I do have an SE. I called Ford and the first dealer was great help he said my VIN was not an actual car and gave up. The second dealer i called transferred me to another department which didn't answer the phone.

        i looked on amazon and the 8" and 9" drums look different the 8" has a chamfer at the edge and the 9" doesn't i wonder if that is a way to determine?
        2000 Black SVT with 114k Build # 1598 1\14\2000 Parting Out
        1998 SE with 99K Daily Driver
        98.5 Black SVT with 47k miles Build #5683 Born on 4\15\1998 crashed... fixing
        2002 Jeep Wrangler X 3" lift with 33 by 12.5

        Comment


        • #5
          If you're getting that much over nine even I'd bet they're the nine inch ones. Unless you have some whopper cooling fin flanges on the edge. No eight inch drums are gonna have an almost one inch thickness to them.

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          • #6
            They do not have any cooling fins on the out side, these are factory drums. I guess I will end up removing a drum and hopefully can re install it with out any damage, then order parts since local parts stores prices are about double or more then online.
            2000 Black SVT with 114k Build # 1598 1\14\2000 Parting Out
            1998 SE with 99K Daily Driver
            98.5 Black SVT with 47k miles Build #5683 Born on 4\15\1998 crashed... fixing
            2002 Jeep Wrangler X 3" lift with 33 by 12.5

            Comment

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