Our truck, shown in signature, with 20" wheels measures 81", carefully measured to include the lights on the cab. We found a car wash that states it is 7', which should mean 84". My DH would like to ...
The big issue(s) will be your tow mirrors and antennae. Tuck in the mirrors and manually wash those areas missed. Also, as in most touch car washes, the antennae can be ripped out. I've used it on occasion with my 2010 F-150. Haven't done it with my RAM because the mirrors seem to be wider than the tow mirrors I had on the F-150.