hunter

Looking to get cheap wheels to have fun with rubber soon; what are the wheel dimensions to place for a 1972 cutlass supreme convertible?

Thanks

hunter

and also what about the backspacing

DarrylJ

The wheels are 14 x 7 with a bolt circle or 4 and 3/4 inch diameter. I am not sure of the backspacing, someone on here should chime in that knows.

joe_padavano

15x7 would be a better choice, given the tire sizes available today. Wheel OFFSET should be as close to zero as possible. On a 7" wide wheel, that would be about 3.75" backspacing. On an 8" wide wheel you want about 4.25" backspacing.

Fasseddy

would 3 1/4 back spacing on 15x 7" wheels on my 1968 cutlass work? i am looking to put 255/60/15 BFGs.

joe_padavano

Go back and read post #4

Fasseddy

I see the #4 post says "about 3.75" backspacing".
Too vague of a statement.
So for clarity: would 3.25" backspacing with 255/60 or 245/60 work without rubbing? I have 15x8 Torque Thrust Ds with 4.5" backspacing currently. Not liking the look.

Fasseddy

Untitled-1.jpg
Here is what I have.

joe_padavano

It also says this:


Zero offset puts the wheel mounting flange right in the center of the rim width. That would be 3.5" for a 7" wheel. Since backspace is measured from the outer lip of the wheel, not the bead mounting surface, there's usually about an extra quarter of an inch added, which is how zero offset on a 7" wheel gets you 3.75" backspacing. I said "ABOUT" 3.75" because different wheels have different lip dimensions, so backspacing for the same zero offset could be up to 4". It can't be less than 3.5". At 3.25" backspacing, the offset will be close to 1/2".