I drive a '86 930 and am planning to upgrade my wheels. I am now currently riding 16" Fuchs knock-offs but am planning on either Fikse Mach V 17" or Kinesis K28 18"
I have acquired, but not installed 13" rear fender flares.
How wide can I go? Will there beissues with an 18" X 12"?

 

cool... if you're planning to upgrade your wheels, then it would also be great to install fender on your auto.. my friend had once replaced his auto with mercedes fender, since fenders are vulnerable to dents, bumps, cuts and scratches..it needs to be changed to avoid irregular protection for your auto..