1. Slantsix64

    Slantsix64 Well-Known Member

    Messages:
    2,130
    Likes Received:
    779
    Joined:
    May 11, 2014
    Location:
    SGV
    Local Time:
    6:35 AM
    hey guys I wanted to put some chubbys in the rear of my barracuda, 15x8 with 4.5 back spacing I have researched works with a 275 60 15 tire. Have any of you guys done this?
     
    Last edited: Feb 14, 2020
  2. toolmanmike

    toolmanmike FABO Staff Staff Member FABO Gold Member

    Messages:
    45,783
    Likes Received:
    29890
    Joined:
    Jan 18, 2006
    Location:
    Iowa
    Local Time:
    6:35 AM
  3. Slantsix64

    Slantsix64 Well-Known Member

    Messages:
    2,130
    Likes Received:
    779
    Joined:
    May 11, 2014
    Location:
    SGV
    Local Time:
    6:35 AM
  4. 72bluNblu

    72bluNblu FABO Gold Member FABO Gold Member

    Messages:
    10,055
    Likes Received:
    4436
    Joined:
    Nov 28, 2008
    Location:
    NorCal
    Local Time:
    4:35 AM
    More than enough room in the quarters for them. What rear axle do you have? Not all A-body axles are the same width, so it matters if it's a 7.25, 8.25, 8 3/4 and whether or not you're still SBP or if you've converted to BBP. Those things will change the backspace needed.
     
  5. Slantsix64

    Slantsix64 Well-Known Member

    Messages:
    2,130
    Likes Received:
    779
    Joined:
    May 11, 2014
    Location:
    SGV
    Local Time:
    6:35 AM
    Hey, yes it's a abody 8 3/4 small bolt pattern axles.
     
  6. 72bluNblu

    72bluNblu FABO Gold Member FABO Gold Member

    Messages:
    10,055
    Likes Received:
    4436
    Joined:
    Nov 28, 2008
    Location:
    NorCal
    Local Time:
    4:35 AM
    15x8 with a 4.5" backspace with 275's is basically the recipe for an A-body 8 3/4 that's been converted to BBP axles.

    With a SBP 8 3/4 it's a little too much backspace, you would be better off with 4.25" or even 4" on a 15x8" with 275's. Basically 4.5" is too much, 4.25" would be great, 4" is borderline not enough. If you get the 15x8 with 4.5" of backspace and run 275's with SBP axles you'll almost certainly need a spacer.
     
    • Like Like x 1
    • Slantsix64

      Slantsix64 Well-Known Member

      Messages:
      2,130
      Likes Received:
      779
      Joined:
      May 11, 2014
      Location:
      SGV
      Local Time:
      6:35 AM
      Hm, now I gotta ask my buddy if he has the big bolt pattern axles, he might or might not. He is the one who told me. to use 4.5 back space, I would want the rim tucked in nice
       
    • tubbedamx

      tubbedamx Location Boise, Idaho

      Messages:
      533
      Likes Received:
      53
      Joined:
      Jan 7, 2007
      Location:
      Boise, Idaho
      Local Time:
      5:35 AM
      Following.
      I have the same car with 255s and they fit great. I have a b-body 8 3/4 that’s a little wider so the 4.5 backspace works.
       
      • Like Like x 1
      • SGBARRACUDA

        SGBARRACUDA ROY FABO Gold Member

        Messages:
        15,660
        Likes Received:
        4819
        Joined:
        Dec 7, 2006
        Location:
        PLANT CITY FL. and PERRY GA.
        Local Time:
        7:35 AM
        I'm running 275x60x15 Nitto drag radials on 15x8 wheels with 4.25 BS. No problem on my 68 barracuda in my Avatar.
         
        • Like Like x 1
        • Slantsix64

          Slantsix64 Well-Known Member

          Messages:
          2,130
          Likes Received:
          779
          Joined:
          May 11, 2014
          Location:
          SGV
          Local Time:
          6:35 AM
          Cool thank you guys! Looks like I'll be using 4.25 back space with the small bolt pattern 8 34
           
        • 72bluNblu

          72bluNblu FABO Gold Member FABO Gold Member

          Messages:
          10,055
          Likes Received:
          4436
          Joined:
          Nov 28, 2008
          Location:
          NorCal
          Local Time:
          4:35 AM
          That's a BBP rear end, and it's wider so be careful as the measurements aren't really relevant for the OP. The other thing is that regardless of which B body width rear axle that is, you probably can't fit 275's with that backspace. My Duster has a 68-70 B-body 8 3/4, and even before the 1/2" spring offset the backspace to center the 10" wheels was almost 6.5". As it sits now I run 295/35/18's on 18x10's with a 7" backspace. But that's with the B rear, a 1/2" spring offset, and disk brakes (which also widen the track). There's a lot of variables to consider.
           
        • moparstud440

          moparstud440 Well-Known Member

          Messages:
          217
          Likes Received:
          58
          Joined:
          Aug 13, 2005
          Location:
          Keymar, MD
          Local Time:
          6:35 AM
          1969 Barracuda
          Drum brakes all around, factory 8 3/4 rear (not sure what year the rear is though)
          Fronts 15x6 4" backspacing with 205/70R15
          Rear 15x8 4 1/2" backspacing with 275/60R15

          Fronts were a little close during turning (approx 1/4" between tire and bottom of fender so I rolled the bottom 2" of the inside lip to get 1/2" clearance). If I had to do over again I'd went with a 215/65R15 tire.

          Rears had to had a 1/4" spacer to get 1/2" space between tire and leaf spring.
          4-6-19 (3).JPG
           
          • Like Like x 2
          • Slantsix64

            Slantsix64 Well-Known Member

            Messages:
            2,130
            Likes Received:
            779
            Joined:
            May 11, 2014
            Location:
            SGV
            Local Time:
            6:35 AM
            Cool! did you have the big bolt pattern axles?
             
          • Slantsix64

            Slantsix64 Well-Known Member

            Messages:
            2,130
            Likes Received:
            779
            Joined:
            May 11, 2014
            Location:
            SGV
            Local Time:
            6:35 AM
            Hey! thanks for the input are you running small bolt pattern axles? also is the tire nice and tucked
             
          • moparstud440

            moparstud440 Well-Known Member

            Messages:
            217
            Likes Received:
            58
            Joined:
            Aug 13, 2005
            Location:
            Keymar, MD
            Local Time:
            6:35 AM
            Yes Big bolt pattern.
             
          • SGBARRACUDA

            SGBARRACUDA ROY FABO Gold Member

            Messages:
            15,660
            Likes Received:
            4819
            Joined:
            Dec 7, 2006
            Location:
            PLANT CITY FL. and PERRY GA.
            Local Time:
            7:35 AM
            BBP. I will post a picture showing how they look later today.
             
          • SGBARRACUDA

            SGBARRACUDA ROY FABO Gold Member

            Messages:
            15,660
            Likes Received:
            4819
            Joined:
            Dec 7, 2006
            Location:
            PLANT CITY FL. and PERRY GA.
            Local Time:
            7:35 AM
            Here is a picture. Clears perfect.

            E96B4189-0656-4E13-BB5C-C3C5D2BCD3D3.jpeg
             
          • Slantsix64

            Slantsix64 Well-Known Member

            Messages:
            2,130
            Likes Received:
            779
            Joined:
            May 11, 2014
            Location:
            SGV
            Local Time:
            6:35 AM
            Thanks you guys!! 4.25 back space stock 8.75 small bolt and stock shocks from 67!

            20200222_131547.jpg

            20200222_131603.jpg
             
          • Slantsix64

            Slantsix64 Well-Known Member

            Messages:
            2,130
            Likes Received:
            779
            Joined:
            May 11, 2014
            Location:
            SGV
            Local Time:
            6:35 AM
            Now or the front! lol whos running 235 60 15x6?
             
          • SGBARRACUDA

            SGBARRACUDA ROY FABO Gold Member

            Messages:
            15,660
            Likes Received:
            4819
            Joined:
            Dec 7, 2006
            Location:
            PLANT CITY FL. and PERRY GA.
            Local Time:
            7:35 AM
            Looks good. I'll check my fronts.
             
          • moparstud440

            moparstud440 Well-Known Member

            Messages:
            217
            Likes Received:
            58
            Joined:
            Aug 13, 2005
            Location:
            Keymar, MD
            Local Time:
            6:35 AM
            See my thread titled "Barracuda tire size"

            I doubt the 235/60s will unless you "massage" the front lower lip of the fender. I'm assuming your talking about a 15" wheel?
             
          • SGBARRACUDA

            SGBARRACUDA ROY FABO Gold Member

            Messages:
            15,660
            Likes Received:
            4819
            Joined:
            Dec 7, 2006
            Location:
            PLANT CITY FL. and PERRY GA.
            Local Time:
            7:35 AM
            215x60x15 on 15x6 in post 17
             
            • Like Like x 1
            • Slantsix64

              Slantsix64 Well-Known Member

              Messages:
              2,130
              Likes Received:
              779
              Joined:
              May 11, 2014
              Location:
              SGV
              Local Time:
              6:35 AM
              I was thinking on a 14 inch rim, but i might just run my 215 70 14 on a 6 inch rim or now, my brother has 225 60 15x6 in his front.
               
            • Slantsix64

              Slantsix64 Well-Known Member

              Messages:
              2,130
              Likes Received:
              779
              Joined:
              May 11, 2014
              Location:
              SGV
              Local Time:
              6:35 AM
              heres 215 70 14x4.5

              20200222_123511.jpg [​IMG]
               
            • Slantsix64

              Slantsix64 Well-Known Member

              Messages:
              2,130
              Likes Received:
              779
              Joined:
              May 11, 2014
              Location:
              SGV
              Local Time:
              6:35 AM
              i do like the 205 70 15 look you have
               
            1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
              By continuing to use this site, you are consenting to our use of cookies.