I know I'm late to this party, but back in the '70s I ran the VW tires on the front of my '57 Chevy street/strip car - maybe 3400 lbs - on some 15x4 Cragars for 3 years. Ran them 32-35 PSI. Never a problem on the streets or freeways...though with 4.88s the most it saw of a freeway was about 12 miles at a time, being 5000-some RPM.