Right now I am running 15x7 cragar SS they have a 4.125 backspacing and a +3.00 mm offset. Im not sure but I believe I have 215/70R15 mounted (I'm 1000 miles away from my car so I cant be sure). I can mount the wheel but it hits the spokes of the cragar so it wont rotate. I put a 1/4 inch spacer behind the wheel and now it no longer rubs but it crashes into my wheel well moldings on bumps or dips in the road.
I dont know what the factory wheel set up was but the reproduction 15x7 rally II is a 4.00 backspace with no offset, if im not mistaken. The reason I havent just got a set of rallys is im running a 15x8 in the rear and the tire isnt rated to go onto a 7 inch wheel.
Im looking at buying two new 15x7 and 15x8 wheels (so i can keept the tires) and either going with reproduction rally II or some American Racing Ansen Sprint wheels because they have the same spacing.
The Progressive spring I was curious about because you could have an initially soft spring for a smooth ride and then a stiff spring to combat larger road irregularities.
Just a general wheel question will increasing the back spacing for a given wheel increas or decreas how far in the wheel well the wheel and tire sit?
