Modern passenger car tires may have the carrying capacity to handle the
vanagon's weight..Unfortunatley you won't find them in a size that will
fit your Vanagon, nor in a pressure capacity for your vanagon (with a
few exceptions). For the weight of the vehicle, the Vanagon uses very
small wheels.

That's why the suggestion to use LT tires and or go to larger rims.

Otherwise you'll run into the Ford Bronco, Bridgestone tire scenario of
too little pressure, to heavy a vehicle and tire blowouts. And you'll
only have yourself to blame.