Tire size for 15" Buick rims on 68-69 Skylark

Discussion in 'The Hides' started by Jeff Pulera, Oct 11, 2019.

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  1. Jeff Pulera

    Jeff Pulera Well-Known Member

    Picking up a 68 Skylark Custom in a few days and someone put the 15" chrome wheels on it. What's the recommended tire size for this combo?

    Thanks

    Jeff
     
  2. pbr400

    pbr400 68GS400

    The only 15” combo on the GS was 1970-72; it was a G60. That tire was about 26 1/2” tall, at least 8” wide and roughly equal to a 245/60/15. 255/60 probably fits, is a little bigger, but needs eyeballing on the rear. I’ve seen people run 235/60 and 225/70 but they’re a little outside the oe height (235/60 shorter, 225/70 taller/narrower). 215/70 is the right height but is narrow.
    Patrick
     
    Last edited: Oct 11, 2019
    1968_GS400 likes this.
  3. BIG FRANK JOHNSON

    BIG FRANK JOHNSON Well-Known Member

    Patrick would the 225/70 be narrower than 245/60? Also would these work on 7 inch rims? Thanks Frank
     
  4. pbr400

    pbr400 68GS400

    The first number is the tire width from sidewall to sidewall. The 225 is 225mm is 8.9” , the 245 is 9.6”. (That’s the tire’s widest part; it tapers to the tread but the tread width corresponds to overall width) Either one is fine on a 7” or 8” rim. Both sizes were factory installed on each width wheel somewhere in GM’s history.
    Patrick
     
    Last edited: Oct 12, 2019
  5. Mike B in SC

    Mike B in SC Well-Known Member

    I run 245/60-15's front & rear 0n 15x7 Buick wheels on my '68, no problems.
     
  6. mbusher83

    mbusher83 Well-Known Member

    I run G60’s on the front and L60’s on the back of my 69, I’ll try and post a pic.
     
  7. efogs400

    efogs400 Platinum Level Contributor

    This was my 68 GS with 245/60/15's
     

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    pbr400 likes this.
  8. Jeff Pulera

    Jeff Pulera Well-Known Member

    Thank you all for your feedback. I know the 70-72 GS cars didn't have radials, and didn't know the P equivalent, but also wondered about clearances with the low, straight-cut rear wheel openings on the 68-69 models

    Thanks

    Jeff
     
  9. pbr400

    pbr400 68GS400

    245/60/15 works great on Buick rallies (as shown by the pics posted) on a stepchild. 255/60/15 seems to fit, too. A G60/15 is actually wider than the 245/60/15 and they fit, too.
    Patrick
     
    1968_GS400 likes this.

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