The front has duel style wheels so I thought I should put the same thing on the back to make them all the same but maybe (most likely) I don't know what I'm talking about. Right now the front 2 are 2 different duel style dished in and one rear appears to be a 16" trailer wheel while the other is a 16.5" split rim painted bright blue so I don't know what I'm supposed to be looking for. The split rim had regular short studs while the trailer wheel had long shouldered studs with 3/4" nuts as spacers put on between the hub and wheel to accommodate for the threads that didn't go all the way down. Typical farmer trying to make something work with what was laying around I'm sure.