I just had a ride in a friends Jeep the other day that runs them, same size too. Though never did any trail riding in them, just went to the local Autozone.
They actually drove really nice on the street. The Jeep had "0 lift SOA springs" (as I'm told, I don't know Jeeps), and that was it. there wasn't any wobble, and it felt incredibly stable. They were Bias ply's too, so they bumped a bit for the first few miles maybe. About as loud as many other agressive mud terrain.
REALLY soft though, I can't imagine they'd last very long.
As for one last thing, they actually measured out to almost 38" when mounted and aired up.