Does anybody have any experience with port a walls lately? I am shopping for 670x15 or 205/75R-15s for my shoebox. White walls a SO much more expensive than blackwalls that i cant believe it, but i am thinking of going the "port a wall "route. My recollection as a kid seeing these, is that they seemed to pull away from the sidewall and looked ratty at some point in their life. Maybe the new ones are made of better material.