I am trying to determine what is the correct rim size for the 3100 1/ ton. The ebay seller of my truck put on a mix and match wheel/tire set, probably so that it could be a rolling vehicle. My only clue is that there is a side-mount rim attached with patchy blue paint to match the patchy blue of the truck. It measures 17 1/2" dia. by 6" wide and has 3 tabs for hub cap attachment. Could this be the correct original size for the truck?

54 Chevy 3100 Deluxe 3 speed on column. Keeping original as possible but changed to 12 volt system.
JB Weld..."I put that stuff on everything"