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GM Rally wheel mystery

Discussion in 'The Hokey Ass Message Board' started by Flat Broke Hotrods, Oct 22, 2010.

  1. Flat Broke Hotrods
    Joined: Oct 22, 2010
    Posts: 3

    Flat Broke Hotrods

    Just got home with my new toy, a '46 Ford coupe. It's got what sure looks like a 10 bolt rear and a early/mid '70s Nova front end and GM rally wheels, 15 X 8 at the rear and 15 X 7 up front. Okay, that's all good. Here's the mystery part. I popped off a couple of the hub caps and measured the bolt pattern, just thinking about changing the wheels and the bolt pattern is 5 on 4 1/2. To the best of my knowledge, GM never made anything with that bolt pattern and yes, I'm real sure. I've gone back and re-measured about 14 times and there's no question, they are 5 on 4 1/2 inches. They are NOT 5 on 4 3/4. The wheels are stamped 'GM K-1' between the bolt holes and the 8 inch ones are stamped 'AZ' by the valve stem. Haven't looked at the fronts. So. What's up with that?
  2. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 24,610

    Jalopy Joker

    if they have 10 bolt holes they are for GM & Ford-search here for thread: lug nut patterns and spacing - The final thread. post some pics of your rims, etc
  3. F&J
    Joined: Apr 5, 2007
    Posts: 13,217


    First thought is that you are measuring wrong.

    Don't take it as an insult, it's just in case you did not know: Measure from the center of one lug hole to the outside edge of a lug hole on the other side...meaning skip one hole.

    If you are measuring center to center, you would get 4.5 on a chevy wheel.
  4. gardenjeg
    Joined: Mar 30, 2008
    Posts: 94

    from nc

    Probably a after market copy of chevy rally wheel do you have any pictures? The center hubcaps probably are a different size also.
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  5. Fast67VelleN2O
    Joined: Mar 6, 2007
    Posts: 494


    The AZ coded 15x8 wheels are 4-3/4". You are measuring wrong.
  6. post a picture of them and be sure to include one of you measuring the bolt circle. easy to measure wrong and because of that i have picked up some cheap aftermarket wheels that somebody claimed were mopar but were really GM.
  7. yekoms
    Joined: Jan 21, 2007
    Posts: 1,088


  8. Flat Broke Hotrods
    Joined: Oct 22, 2010
    Posts: 3

    Flat Broke Hotrods

    Yup. You guys are right. I measured wrong. I knew that once but I forgot it. I got a real good memory but it's SHORT. Seems like the older I get, the shorter it gets too. ;-)
  9. F&J
    Joined: Apr 5, 2007
    Posts: 13,217


    join the club....:(... there's other things that go bad with age but I forgot exactly what :confused:
  10. Deuces
    Joined: Nov 3, 2009
    Posts: 18,414

    from Michigan

    I got pics of a '62 Fairlane that has the Chevy Rallyes on it......
  11. So how do you measure? I have been looking for 5 x 4 3/4 but have been measuring center to center on the bolts and I always seem to come up with 4 1/2
  12. squirrel
    Joined: Sep 23, 2004
    Posts: 45,242


    center of one hole to the outer edge of the opposite hole
  13. measureing up short can be a problem for alot of men...
    Joined: Nov 22, 2005
    Posts: 7,592

    from SIDNEY, NY

    All right. Now, go sit in the corner and think about what you've done.
  15. Lobucrod
    Joined: Mar 22, 2006
    Posts: 4,117

    Alliance Vendor
    from Texas

    on five hole wheels i always measure center to center skipping one hole and add 1/4 inch. Squirrel's method works just as good.
  16. Great thanks! That will help me alot : )
  17. Ranunculous
    Joined: Nov 30, 2007
    Posts: 2,459


    Life's a cinch with an extra inch!

    Those plastic bolt pattern index wheels sold at car shows are well worth the money.
    I have to get one too!
  18. Helpful picture

  19. draggin'GTO
    Joined: Jul 7, 2003
    Posts: 1,754


    The '61 -'63 Pontiac Tempest & LeMans cars actually did have 15" wheels with the 5 on 4-1/2" bolt pattern. Of course these cars never came with rally wheels of any kind.
  20. Earlier in the year WHEELKID had a thread with with a listing of all GM ralley wheels with size, width, years, and vehicles they came on. Found out the two I have are for '70 El Camino. I would put the link in this post but how that is done is still magic to me.

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