Best option is to get the backspace on them. As long as they are 3.5 to 4.5" you should be fine. 3.5" would be ideal to center the wheel in the well, but 4" will fit fine as well. Just my .02.
86 Cutlass
- Thread starter Jax86Cutlass
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How would I measure backspace on the wheel? I am looking at picking up the set from a seller on Craigslist, and he does not list the backspacing in the ad.
I would double check this and others may know this answer better but I think the bolt pattern is not 4.75. I thought it was narrower. I would double check before you buy anything and right about the back spacing. As far as bolt circle, tape measure from the outside of one stud to the center of the stud directly across from it. Summit racing has the diagram on line so you can refer to it if you don't understand what I mean. Am I wrong? Anybody?
Measure backspace by measuring from the flange where the wheel mounts to the axle to the rim bead on the back side of the wheel.
5 on 4-3/4" is the correct bolt pattern. To the OP: check out this thread.....
https://www.gbodyforum.com/threads/wheel-fitment-guide.2442/
https://www.gbodyforum.com/threads/wheel-fitment-guide.2442/
Forgot about back spacing: straight edge on your brake drum and not the axle pilot that sticks out past it. From the straight edge, move your tape measure to the outer portion of the straight edges where your radius of your new tire is going to be. Make sure the jack stands are under the axle that way the suspension is compressed, and measure to the inside of the wheel house and consider the closest point to your new tire. That's the amount of back spacing you want. Then make sure that the overall width of the tire will not be hampered by your quarter panel, wheel lip, etc... When I was building my 56' I built a wooden buck that bolted to the rotor and it had a 2x4 that stuck out to represent the overall radius of the tire and rim combo. Then I made a perpendicular 2x4 that was the maximum tire widthand I rotated the axle thru a couple of revolutions with the suspension compressed to be sure there were no obstructions. Elaborate, but it works.
Or this works. But I was thinking that he doesn't have the wheels yet. But the same procedure would apply on the car only brake drums to inner wheel house.
Cool man. I had it in my head that it was narrower. thats why I said double check always.
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