1. jacko241

    jacko241 FABO Gold Member FABO Gold Member

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    Currently I have 275-50R-15 Hoosier DOT slicks on 8 inch wide wheels on the back. I want something taller. Do you guys think a 275/60R-15 will fit?

    1974 BB Duster-2.jpg
     
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    • toolmanmike

      toolmanmike Moderator Staff Member FABO Gold Member

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      Here's a tire chart. It looks like 3" difference in the diameter. 1 1/2" on each side. Do you have that much room between the tire and the front of the wheel opening? The width shouldn't change. Tire Size Chart
       
    • jacko241

      jacko241 FABO Gold Member FABO Gold Member

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      Thanks Mike. It looks like about 2.2 inches taller than my 275 50 15s. I think they will work. I am going for that old school pro stock look.
       
    • bballfan1

      bballfan1 Well-Known Member

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      You can fit a pretty good size tire in there, if your wheels are 4.5 back spacing
       
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      • toolmanmike

        toolmanmike Moderator Staff Member FABO Gold Member

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        Look again. 3" difference between the two.
         
      • jacko241

        jacko241 FABO Gold Member FABO Gold Member

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        Yes they are 4.5 bs.
         
      • jacko241

        jacko241 FABO Gold Member FABO Gold Member

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        Unless I am reading it wrong it says 275/50-15 is 25.8 and 275/60-15 is 28
         
      • toolmanmike

        toolmanmike Moderator Staff Member FABO Gold Member

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        I see 275-50 as a 25" tire. upload_2021-11-24_8-57-24.png
         
      • toolmanmike

        toolmanmike Moderator Staff Member FABO Gold Member

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        Sorry, my mistake. I wasn't paying attention to the actual dimensions just the approximate column. My bad
         
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        • Uncle Bob

          Uncle Bob Well-Known Member

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          These are 275-60-15s on my Duster
          x0uDiBG.jpg

          Springs are in the stock location. There's no problem with the lip, but I've got got less than a finger width between the sidewall and spring.
           
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          • bballfan1

            bballfan1 Well-Known Member

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            4.5 bs stock location and no quarter mods

            320CF7CD-C74A-4B16-9801-1A7409F49706.jpeg

            C45A55B2-8AA3-4726-8EDD-DA3630159907.jpeg

            284B6383-E887-4AAD-9458-6AE41F73D8AA.jpeg
             
          • jacko241

            jacko241 FABO Gold Member FABO Gold Member

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            Thanks! As far as I can tell, my springs are in stock location, I don't see any mods to the mounts, but I am not sure if my 8 3/4 is an A body or B body housing.
             
          • Ernie B

            Ernie B Well-Known Member

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            I have 275/60R15 tires on 15X8 steel wheels. I had to trim about 1/4 inch off top of inner wheel lip. Car sits a stock height with no rubbing. 70 340.jpg
             
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            • Uncle Bob

              Uncle Bob Well-Known Member

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              Yeah that'll make a difference. Mine is a C-body housing cut down to A-body width with BBP axles which adds brake offset too. I'd say my car is sitting above stock ride height too but it has factory springs under it.
               
            • Uncle Bob

              Uncle Bob Well-Known Member

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              This shows a little better how high the car is above the tire.

              9Rn7vcs.jpg
               
            • jacko241

              jacko241 FABO Gold Member FABO Gold Member

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            • jacko241

              jacko241 FABO Gold Member FABO Gold Member

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              That's the look I want, I love the steel wheels!
               
            • jacko241

              jacko241 FABO Gold Member FABO Gold Member

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              I have air shocks so that won't be a problem.
               
            • Uncle Bob

              Uncle Bob Well-Known Member

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              FWIW I painted the wheels so I took a photo of the rear wheel stamping and there's no offset, it just says CUSTOM.

              IMG_2672.JPG
               
            • 70 Buster 340

              70 Buster 340 Carbon Footprint FABO Gold Member

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              my experience on 70 Duster.
              at 28" tall there is no issue clearing front of wheelwell ... but...275's have about 11.2 inch section width on 8" rim and that's too close to the spring with 4 or more inches of backspace.
              That's With original spring location and axle width.
               
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              • jacko241

                jacko241 FABO Gold Member FABO Gold Member

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                So I do have 275 50s on it now, 4 inch offset, and I have exactly 3/4" between the tire and the spring. looks to be about 1/2" from fender lip.
                 
              • Uncle Bob

                Uncle Bob Well-Known Member

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                As mentioned earlier, the BBP axles increase the brake offset. There would've been no way to get my wheel/tire combo on the car without that. There was a while after I'd ordered the tires that I was shopping for wheel spacers but it turned out I didn't need them.
                 
              • QuickDart360

                QuickDart360 Well-Known Member

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                Can you share wheel backspace?
                 
              • 70 Buster 340

                70 Buster 340 Carbon Footprint FABO Gold Member

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                Jacko,
                I was speaking to the section width of the 275R/60/15s I bought. With a 4.25in Back Space tire didn't clear spring at 11.2 section width.
                I won't run 'universal spacers'. Can't find drilled 5 on 4 solid spacers.
                It's all about back spacing.
                Easy to measure drum face to spring and use simple math from there for clearance based on tire OD/Tread width/actual (not advertised) back space.
                Section widths vary a little by manufacturer.
                 
              • jacko241

                jacko241 FABO Gold Member FABO Gold Member

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                I get what your saying. My current tires have a section width of 10.3, while the tires I am considering are 10.7. Seems like they will barely clear with current wheels.
                I have BBP wheels, so I might be able to find a 1/4 spacer just to give me some extra clearance if I need it.
                 
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