The only reason you see Super Singles on over the road trucks is because of bean counters in the trucking industry trying to get the CEOs more profit. And some RVer sees them and thinks its such a wonderful idea and puts them on his motorhome. On some rigs, like cement trucks, they are necessary as floatation tires because they prevent tearing up of customers lawns, driveways and sidewalks.
I was riding on Super Singles way back in the 1980's down in Florida and hated them. Also had them in the late 1990s and early 2000s on petroleum transports. They were like pregnant skate boards when it rained on that hot black asphalt!!! Even worse if you were hauling a real light load. And on snow - forget it. After my many years of experience of driving on Super Singles, I can tell you that you will never see them on any vehicle I own! The only reason I had them is because someone else owned the equipment.