Hello their i have recently purchased some porsche design 90 alloys for my 1983 mk1 golf gti. I was just wandering if any body could recomend a tyre size and what size wheel adaptor i would need. I know i can get 20,25,30,35,40 or 50mm adaptors but would any mods to the wheels arches be required. The wheel sizes are FRONTS-7Jx16 ET55 and the REAR-8Jx16 ET52.3. I was thinking of running 205/40r16 would these be okay i dont know. Any help would be very appreciated...