[V]

ok now im thinking, MAYBE a 8" wide rim would fit in the tire well if i run a 215 or 225 width tire...

because im thinking the 18x8 srx rim should fit on the car...

the stock rim is 8.5" with a +42mm offset...
so a rough estimate is that backspacing is 4.25"(or107.95mm) and add the 42 for a rough total of 149.95mm

srx rim is 8" with a +51mm offset...
so backspacing is close to about 4"(101.6mm) now add on the 51mm offset for a rough total of 152.6mm.

149.95mm vs 152.6mm is only less than a 3mm difference(2.65mm or 0.104")

now the question is, would a 1/10th of an inch make a difference?
I could always get a 1/4 spacer and use that when i need the spare....

if it would fit, on the car and in the trunk.... then i wouldnt need to spend more money to have them narrowed.