Pictures of 275/60/15 on 7" Rims

Discussion in 'The Hides' started by Cutlass, Nov 25, 2018.

  1. Steve73GS

    Steve73GS 73 GEE YES

    Anyone know the widest rear tire/rim combo that will fit on a 73GS without rubbing with no modifications? Thanks

    Steve
     
  2. gsgnnut

    gsgnnut Well-Known Member

    I run 275 60 on 7 in rims no problem.
     
  3. Cutlass

    Cutlass Platinum Level Contributor

    I made it out to the offsite storage yesterday in order to do some measurements. As preparation I did built some sort of gage. That way I was able to simulate different tire sizes (width and diameter).
    IMG_3685_low.jpg IMG_3679_low.jpg
    To make a long story short:
    I am lucky in terms that the body sits aligned on the frame.
    295/50-15 on 8" rims with 4.5" backspace (equals 0-offset) will physically fit w/o bodywork, I will have to modify the exhaust, though.
    IMG_3674_low.jpg IMG_3675_low.jpg IMG_3680_low.jpg IMG_3683_low.jpg IMG_3684_low.jpg
    What bothers me a bit, though is the german TÜV who will have to sign off on the new tire size in order to get the modifikation legalized. They are picky at times and might insist on bodywork, no matter what.
    Well I think I will give it a try, anyway.:p

    Any recommendations as to a good source to get 2 15x8 Buick rally rims? For now I have my eyes on a set from Cooker-Tires. It looks like they are very close in terms of look compared to my installed 15x7 which I will keep for the front.
    https://www.cokertire.com/wheels/buick-rallye-wheel.html
    Thanks for any opinions.
     
    wkillgs, TrunkMonkey and rkammer like this.
  4. rkammer

    rkammer Gold Level Contributor

    Cutlass, that's quite a test tool you made there.
     
  5. TrunkMonkey

    TrunkMonkey Well-Known Member


    Ja! Sie müssen designpläne, erstellen!!
     
  6. Smokey15

    Smokey15 So old that I use AARP bolts.

    275/60-15 on 7' TorqueThrusts.
    12 13 (11).JPG
     
  7. Steve73GS

    Steve73GS 73 GEE YES

    Thanks GSGN. Your response is for a 73GS or did you fit that tire/rim combo on a different year?
     
  8. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Steve,
    What you need to do is contact someone familiar with the 73 cars. The 2 guys I know of are Phil Roitman (we call him Mr. 73), and John Csordas,

    http://www.v8buick.com/index.php?members/philip-roitman.8447/

    http://www.v8buick.com/index.php?members/skyhawk.378/

    Phil has a 73 Racecar, and John used to. They can tell you the widest tire you can use without modifications. PM them.
     
  9. Steve73GS

    Steve73GS 73 GEE YES

    Tks Larry. Actually, John will be working on my 73 (due partly to your recommendation) and he previously mentioned 15 x 8' s will fit no problem but since then, I've been wondering if I could go wider (15 x 10's) to accept 295/55/15's but I know he is busy and hate bothering him with every little question so I thought I would throw it to the forum...will ask him next time I speak to him.
     
  10. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Private Message him on V8, click on the link I provided,

    http://www.v8buick.com/index.php?members/skyhawk.378/

    Click on the information tab, scroll down and click "Start a conversation"
     
  11. Steve73GS

    Steve73GS 73 GEE YES

  12. Cutlass

    Cutlass Platinum Level Contributor

    Thanks guys, appreciate the feedback. Other than some scribbled sketches (metric, not imperial) I do not have documentation. It was one of this "Oh my god I gotta come up with something quick" activity. It is a one evening Q&D solution made from some leftover material lying around in my basement. Michael, if you are still interested I would be happy to send you what I got and some more pictures of the "tool".
     
  13. TrunkMonkey

    TrunkMonkey Well-Known Member

    Sure. If you can make some measurements of your "tooling" as well, I can have our draftsman make a set of drawings and I'll post them as a PDF. :)
    Vielen danke, Ralf!
     
    Canadian GS 350 likes this.
  14. Cutlass

    Cutlass Platinum Level Contributor

    I finally found the one and only inch tape measure in my possession and took some pictures. Beside of the bolt circle and the way the top piece is bolted onto the sliding piece (in order to get the 0-offset right) there is no need for following the dimensions I choose (as I used leftover material) really accurate. The boltcircle is 4.75", the holes for the bolts are 7/16, but I drilled them a little bigger for easier slide on. So here are the pictures:
    IMG_3738_low.jpg IMG_3739_low.jpg IMG_3740_low.jpg IMG_3741_low.jpg IMG_3742_low.jpg IMG_3743_low.jpg IMG_3744_low.jpg IMG_3745_low.jpg IMG_3746_low.jpg IMG_3747_low.jpg
     
  15. Cutlass

    Cutlass Platinum Level Contributor

    Part 2
    IMG_3748_low.jpg IMG_3749_low.jpg IMG_3750_low.jpg IMG_3751_low.jpg

    Don't hesitate to ask questions, I'll be glad to help.
     
  16. Cutlass

    Cutlass Platinum Level Contributor

    Delivery Truck came yesterday :):)
    IMG_1856_low.jpg IMG_1857_low.jpg
    Boy, those 295ers look fat. Can't wait to see them on the car.
    Has anyone an idea how to remove the blue protective layer on the letters?
     
    wallypep likes this.
  17. knucklebusted

    knucklebusted Well-Known Member

    The blue washes off. A light bristle brush will do it faster.
     
  18. Cutlass

    Cutlass Platinum Level Contributor

    My Buick is back in town :):)
    First thing I needed to find out is how good the new shoes look, and how they fit.
    As it looks like I do not have to do any bodywork. The clearance to the exhaust is borderline 1/2 to 3/4, but I will give it a try and modify exhaust only if it comes to some rubbing while driving. In hindsight I realized that using my test tool I did set it to the wrong diameter (to big) :confused:. Thats why the previous pictures showed some collision in between exhaust and tool. Additionally my tool reflects a rather "square" shape of the tire. In reality the shape is different (also depending on the width of the wheel).
    IMG_1915_low.jpg IMG_1916_low.jpg IMG_1917_low.jpg IMG_1921_low.jpg
    Last one: Who finds the mistake?;)
    IMG_1922_low.jpg
     
    wallypep likes this.
  19. Clarkie

    Clarkie Well-Known Member

    I'll try, the right side tire is the 295, the left is not.
     
  20. Cutlass

    Cutlass Platinum Level Contributor

    Bingo, congratulations and your win is a glass of good german beer to be picked up in person in Schweinfurt, Germany.
    And here is the answer for all others who tried so hard: Left is still 245 :)
     

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