It looks like to me it depends on two variables. One, how high the rear fenderwells are in relation to the tire/wheel and two, what tire you are trying to run. Section widths will vary even with the same published size. Street drag tires look to have less bulge in the sidewall area. I run my rear end height just 2" above the wheel rim and there is no way the 12" wheel will work with the 12x29 Hoosier slick. If I jacked the car up until the rear fenderwell lip was above the center section then I could run the 12" wheel and probably a larger tire.