15 x 6.5, Carat 2's

[oasis]

I had 195mm width tires on the front and 205mm on the rear of mine. I changed the front because I had some fouling on the one fender initially. After some tweaking and progress, I discovered it was affecting only one fender because it was an aftermarket fender and it was off by just enough to create my headaches. Had I known from the get-go, I might have left the 205's on the front as well.

I'd be a little reluctant to suggest an aspect ratio for you without a car in hand to measure. Your Vanagon wheels are 15" diameter whereas my BBS's were 16".

If you can get a dummy spare mounted, it might help.