You can't know what will happen to contact patch or roll : Cg body roll without actual testing.

In general the only way to know what the proper inflation for your exact tire/car is will be experimentation and watching your tire wear.

I know that with Dunlop grandtrek M3 RF tires I will get edge wear = under inflated at 32. I now use 33-34 to counteract that and I haven't driven enough miles to see any wear at all yet much less more wear center or edge.

When Ford had a huge problem with explorers rolling over, the "fix" was to change OEM tires and add a couple psi to the door jamb recommendation.

That said, there is a lot of safety margin; plenty to account for 3psi drop over base recommended.

I personally would look for a better set of taller ratio non RFT tires then if that's not enough knock down the psi a little bit.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)