Looking for new shoes. Rims question

Brakes, Suspension, Rims and Tires

  1. ArnieJr

    ArnieJr New Member

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    Hello, I recently posted a question about putting some slightly wider tires (and ergo, wider rims) on my 1969 300. I'm leaning heavily towards 235/70/15s up front and 255/70/15s on the back, running on seven or eight inch wide rims. I know it may depend on what brand/type I get, but will I need spacers and if so, what size?
     
  2. polara71

    polara71 Old Man with a Hat

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    4 1/2 backspacing on the wheel is all you need. No spacer.
     
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  3. Ross Wooldridge

    Ross Wooldridge Senior Member FCBO Gold Member

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  4. Wollfen

    Wollfen Old Man with a Hat

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    I have a set of 235.70.15 tires on 5.5in rims now on my GT and they sit fine, I think a 7in rim may be a bit much for 235/70s.

    Outside1.jpg
     
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  5. rapidtrans

    rapidtrans Senior Member FCBO Gold Member

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    93E762D2-6DA9-4483-96AC-2F7681EAAA85.jpeg BCED1E35-7E5D-4279-8F5B-89C0E13414B5.jpeg
    225/70x15 tires on 7” wide rim work just fine. Any narrower rim squeezes the tire imo.
     
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  6. furious70

    furious70 Well-Known Member

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    7" rims work great for both tire sizes you want to run
     
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  7. ArnieJr

    ArnieJr New Member

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    I got those numbers off a website, can't remember which. It recommended 6 to 8 for 235s and 6.5 to 8.5 for 255s. Of course, my tire knowledge is negligible, so I'm at google's mercy ;-)
     
  8. rapidtrans

    rapidtrans Senior Member FCBO Gold Member

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    Note:
    You’ll find that most reputable and all chain tire stores will not install tires on a rim not within the “recommended” rim width dimensions. An issue I ran into searching for tires for my original 14”x5.5” wheels.
     
  9. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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    Running 235/70-15 on 7" road wheels on my '70 300.

    aElA8t0.jpg
     
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  10. ArnieJr

    ArnieJr New Member

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    I'm really liking the American Racing Outlaw rim, but it's 3.75. Will that still work? There's a similar one from US Wheel with 4.5, but never heard of that brand.
     
  11. polara71

    polara71 Old Man with a Hat

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    Unlikely , that would imply the front spacing is larger than normal. Start taking measurements...