69 Roadrunner rear tire size inquiry...

1968 -1970 Mopars

  1. Hotrod20

    Hotrod20 FBBO Gold Member FBBO Gold Member

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    Looking to purchase some Cragar S/S wheels and tires for my 69 Runner. Anyone have some pics of what rear tire sizes look like on stock suspension?. I may install S/S springs later, but prefer not to use air shocks. I'm thinking 15 x 8 on the rears but with what tire size??. I will be using either 15 x 6 on the fronts with 215/75/15 tires, or 15 x 4's for that race car look.
    I love the old Cragar S/S wheels...its only taken me 50 years to finally spring for a set, lol..
    HotRod20
     
  2. 4mulas

    4mulas Well-Known Member

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    Rears on both cars are 15x8 with 255/60r15. Front on Q5 car is 15x7 with 215/70r15, front on yellow car is also 15x7 with 245/60r15. Both cars have hemi rear leafs. There’s plenty of room for a 275/60r15 on the rear. 10” wheels with the right backspacing should also probably fit no problem B8760746-CAE0-440A-AD29-DB04FC23F0C8.jpeg E28565F9-3D2B-4AAC-A1D4-CB3A3FF16A70.jpeg
     
    Last edited: Jan 14, 2020
  3. Ranger16

    Ranger16 Well-Known Member

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    Front - 225/70/15
    Rear - 245/60/15 RR With New Tires.jpg
     
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    • Hotrod20

      Hotrod20 FBBO Gold Member FBBO Gold Member

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      Thanks! nice rides!
       
    • 33 IMP

      33 IMP FBBO Gold Member FBBO Gold Member

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      Be aware of the backspace on Cragar ss. The old "deep dish" cragar had too little backspace (the "deep" dish) and as a result you couldn't get much tire on them .
      The generally accepted bs here for runners is 4.5 for a 8-8.5 wheel. A bigger backspace number moves the tire closer to the springs. I have had 10.5 slicks, roughly the same size as 295x65 , on my completely stock suspension 69 rr, on a 15x8.5 wheel with 4.875 backspace, but it was tight to the spring.
      What is nice about too much backspace is you can adjust where the tire ends up with spacers, with too little backspace , the tires rub on the fenders.
       
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      • JimCoronette

        JimCoronette Well-Known Member

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        15x7s all around 235-70s in front, 275-60s in rear.

        Looking back, I would go 15x8s in the rear

        70 roadrunner 001.JPG
         
      • 69ACME

        69ACME New Member

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        I have 275/60-15's on 8" Cragars on the back of mine. They fit fine inside the wheel well without lifting the car.
         
      • Plum Crazy R/T

        Plum Crazy R/T Member

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        Norwalk 2011 015.jpg 15x8 wheels with 275/60/15 drag radials on the rear with SS springs
         
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        • 69ACME

          69ACME New Member

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          275/60-15 on an 8” Cragar

          F7D2942A-8BF8-44B5-AB7A-0072E9E1D6E6.jpeg
           
        • red 69 runner

          red 69 runner Well-Known Member

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          I have 15x8 with 4.5"BS with 275.60.15 on rear with 15x6 with 225.70.15 on front,rear is factory stock ride height with pleanty of room. 20170730_155540.jpg
           
        • Hotrod20

          Hotrod20 FBBO Gold Member FBBO Gold Member

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          Wow ! thank you to all who replied. This helps me out a lot.
          Anyone else ?,... feel free to post pics of your tire and wheel combos. Awesome stuff!!
          HotRod20
           
        • ricks_RR

          ricks_RR Well-Known Member

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          275 rear and 225 front 0608190758b.jpg
           
        • jdakrt

          jdakrt FBBO Gold Member FBBO Gold Member

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          295/50 on 15x8 4.5" backspace rear
          235 60 on 15x7 4.5" backspace front
          Only picture I have of a side profile... does not do it justice as the rear is up on rollers. I liked this look better than the 275 rear, fatter tire. BUT you do have to drop the front 1/2" to get the same rake as a 275/ 225 combo.

          IMG_8809.jpg
           
        • hunt2elk

          hunt2elk FBBO Gold Member FBBO Gold Member

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          My RR. 275/60/15 on 8" in the rear and 225/70/15 on 7" on the front.

          20200114_153244.jpg
           
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          • GetX'd

            GetX'd Making Life Great Again!

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            8AC0F127-765B-4D40-8DBB-ADFD89229FC9.jpeg
            My GTX has always had my much loved Cragar SS wheels on it. 15x8 in the back, 15x6 in the front. Back tires are L60s. As was stated watch the back spacing you order. It will make a difference in what you can fit under the wheel wells.
             
          • Jerry Hall

            Jerry Hall FBBO Gold Member FBBO Gold Member

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            20190919_174115.jpg
            15X8 rims on all 4. 275/60r15 rear 245/60r15 front.
             
          • Dennis H

            Dennis H FBBO Gold Member FBBO Gold Member

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            7298A864-1CB7-486A-8827-C936033CC1E0.jpeg Coronet. 15x8 rear. 295 50 15’s. 225 70 14’s front.
             
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