Quote:
Originally Posted by OBeer-WAN-Kenobi
So, would I be OK in the area of:
Front 8" wide rim with 4.75" BS
Rear 9.5" wide rim with 5.5" BS
Or would I be safer with a 9" rear rim with ?? backspacing?
I have stock front discs for now and rear drums.
As I said, at some point in the future I'll be lowering aprox 2", probably with the ridetech setup.
I want to get as wide a rear tire as possible while still not getting too close to rub.
I'm also thinking I'll want to go with a 26" or 27" tall rear tire.
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Ideal backspacing for a 1st gen:
18x7 w/4.25" BS
18x8 w/4.75" BS
18x9 w/5.25" BS
18x9.5 w/5.5 "BS
If you are looking at wheels that list an offset, you are looking for +6mm to be dead center in the wheel well.
A 245/40/18 is about as big as you can go up front, and you still may have some rubbing issues. 275/40/18 is about as big as you go in the rear without tubs. Obviously each car is different, and GM tolerances were questionable back in the day. Some cars seem to get away with slightly bigger, and some have had issues with slightly smaller.