No, not a run flat. I only know what you guys say about them. They sound like good insurance against blowouts. I ran lower pressures in the Yokohama,but anything below 38psi was squishy. Even at 40psi on the side stand the side wall gives enough to put a 2" patch on the ground.
Ive been on it now for 2 seasons and feel confident with it. Like any car tire it takes a bit more to get it started in turns but once there its planted.
Will probably move to a motorhome now that the wife is retired.
So the B will be up for sale in a few months.