Semi trucks use these tires for two reasons. Fuel economy and weight. A semi will have about a thousand pounds difference in there light weight than with duals. Fuel savings are also a factor. In a motorhome application.....stick to duals. A major concern can be tire availability. If you have a tire issue in a rural area a 445/50/22.5 more than likely won't be available. At a thousand dollars per tire not every tire store is going to stock that tire. A road hazard that causes a tire failure for a 445/50/22.5 AKA super single will usually result in wheel replacement. In a single wheel application the tire goes flat your then riding on your wheel which results in a ruined wheel. Cost of wheel....around $500.00.
