I have ridden my LAS clinchers as low as 32 psi on a grassy course with no rocks or sharp edges. I think that a lot of clinchers list a high minimum pressure for legal reasons. You see the opposite with road tires. Even though your average road clincher would be fine at 130+ psi, most manufacturers list a limit of 120 psi to cover themselves in the event of a failure.
Note: anyone who runs their road tires above 110 is silly.
i have run PDXs as low as 34psi and i'm 220lbs. no problems whatsoever.
i'd imagine the LAS would fine.