Bills67

can anyone tell me what is the biggest 15" tire and rim combination that will fit on the rear of my 1967 442, including back space?

Rocket Fire V8

There is an older article about this from a lesser known site called oldsmobility.com. Don’t know who runs the site, possibly one of our forum members. The article is called “Biggest Meats for Your Muscle Car.” I believe it’s recommendations are all based on using factory ride height.

Here’s what it says about 64-67 GM A- bodies……1964-1967 GM A-bodies
15- to 18-inch: All rim diameters use 8-inch-wide wheels with 4-1/2-inch backspacing. Use tires with a 245 section width and aspect rations as follows: 15-inch, 60; 16-inch, 50; 17-inch, 40; and 18-inch, 35.
Link……. http://www.oldsmobility.com/old/fitting-wheels.htm

Bills67

thanks for the info!!

Rallye469

Not sure that’s quite correct.
I have 275’s on my ‘65.
8.5” rim w/4.5” BS

I also have 325’s on my 70…much more than their 255’s
(only a little hammering required )

-peter

Bills67

got it! thanks

joe_padavano

I was going to say that 245 sounded small. The 64-65 cars have the smallest wheel wells, 68-72 the largest. The 66-67s are in the middle. The key take-away from all these posts is that the wheel offset is right around zero (4.5" BS on an 8.5" wheel, for example).