OK. Just spent a considerable amount of time searching the forums but did not find the answer I needed. Will 15 x 8's w/ 3.75" offset (4 lug pattern if that matters) fit under GT flares? If not why? If so, what is the largest tire size that can be used?

I don't know about the offset, but the factory Fuchs in 15x8 fit fine with 225/60/15s for a period correct look on 5 lug cars. I even use 1/4 inch spacers to space mine out to nicely fill in the fender flares.

It also depends on how your flares are mounted. There is some tweeking room left to the bodyman when they're installed.

9" fuchs fit under rear gt flares.....
8" upfront no prob...

why stay 4 lug???

3.75" backspacing isnt much.....

stock is 112-120mm depending on fuch width...

and 120mm is 4 23/32"...

your wheels are gonna stick out a whole bunch... WHY not fill it out right?

Steve,

I don't know if you recall the ones on my car, but the rears are 255/40-17 on 993 Cup wheels (55mm + offset w/spacers). They fit, but they are pretty tight.


Andys

if the flares are on the car, you can test fit my 4 lug 17x8's with 245/40s...

10 inches wide, 5 inch backspacing....

opps...nix that idea, I read your location as Santa Clara up near me

I ran 245/45s on 8 inch Fuchs with a one inch spacer....had to pinch the lip.....RCH left.

I have an idea for a custom car using a 914. It would require that I install fiberglass flares (rivet on). I would like the car to have a vintage porsche look. Thus I would like to use wheels like this with the porsche nipple hubcaps. The idea is to pull from the older Spyders & Speedsters.

non optimal offset....

and... spyders and speedsters were wide 5 lug (5x205)