Hi, I'm new here. I stumbled upon this group when trying to find specifics on what type of rim I need to get in order to mount a spare tire. I have a 2003 Holiday Rambler Imperial. According to the brochure, it is on a Roadmaster chassis. I am now learning more than I ever wanted to know about all of the various types of hubs and rims for tires. I need to get the exact hub opening and Lug Spacing, Budd vs. Pilot. The known quantities are that it is for a 22.5 inch 295/80R/22.5 tire on an 8.25 wide rim. I currently have all aluminum rims on all 6 tires. This will be for a spare carried on a Roadmaster spare tire holder hitch. Most likely I'll go with a steel rim due to it being a spare to get me to the next major tire store and not be at the mercy of roadside assistance highway robbery pirates. BTW I found a deal at Camping World.