Parking here is extremely tight. Hence softroading is common if not
mandatory :-[
I got onto a packed dirt embankment lately and it looked like the rear
right was nearly off
the ground (A4 with sport suspenders has extremely beefy front and
rear sway bars and i think
that was a contributing factor to my one-wheel-in-the-air scenario).

The Michelin X-Ice 2 are 195 65R15 and the front right tire was
severely squished,
as if it had 10psi (it actually is inflated to 32).
It seems that two diagonally opposed tires (FR & RL) were severely
overloaded while FL was
carrying maybe 1/8th of the car weight. XI2 survived somehow with
about 3800lbs worth of
a car essentially resting on 2.5 tires; thusly I wonder
to what extent the passenger tires are overbuilt.

Me thinks if I have 91 load rating that's 1356lbs and 3800/2.5 is
1520lbs.
If one manages to get two tires in the air that's 1900lbs per tire -
waaaay over the 1356lbs rating.
A blowout is sure to follow or not?

Now suppose I deflate to 25lbs before venturing into soft sands, load
capacity should drop lower yet, right?

thanks