Originally Posted by
stout
Wheels sure look like 15x7 Fuchs, and certainly aren't 15x6s. It's hard to imagine 15x8s with this bodywork (looks like very mild factory flares in back only?). So, given that it's a narrow car and you've probably got 7s, a 195/65R15 or 185/70R15 is probably your best bet. 165R15 is gonna be too narrow on a 7-inch wheel, I think?
I'd just go over to TireRack and buy a cheap set of 185/70R15 tires that will hold air—or just one tire to replace the one that doesn't hold air?—and spend the difference on indoor storage. Unless it's super rusty in all the wrong places, this is so a car worth saving.
I'd also recommend anonymizing your city/state here on the forum, and maybe deleting the link to those photos until you've got the car stashed away.
Hope to see you smiling in this car on Bay Area roads soon!
pete