I was driving on super singles way back in the early 1980s. And again when I retired in 2003. No way would I want them on my diesel pusher!!! Some cons have been pretty well covered above. Expense of buying new super single wheels (have you priced them yet:R?) And you think regular 22.5 Michelins are expensive!!! Three years ago super singles were running $872.68 + $31.66 FET each. Bet they are over $1000 each today:B. Plus the traction is horrible, and they don't like to stop well:E. And when you get a flat, you sit where ever you are at and wait for a tire truck. And seeing you have super singles, you may sit a very long time waiting for a new tire, cause not all shops maintain them in their stock. All the drivers I knew did not like them. Only people I knew who liked them were bean counters who did not drive trucks with super singles.