That's been the benefit to me, still having a drivable rig when a tire shreds. But, there is also something called a "super single" that's a double wide single

That's been the benefit to me, still having a drivable rig when a tire shreds. But, there is also something called a "super single" that's a double wide single wheel/tire, with one on the end of an axle rather than two. I'm told they're cheaper and lighter total, as opposed to the more common two per end. I've pulled a few trailers that had them. I don't really know why one or the other, I just drive them.