I have a semi hay trailer same vintage .It has dayton wheels . It came with 10.00x20 tires . As they fail I get takeoff 11x22.5 tires from my trucks I replace the 10.00x20 tries and rims on the trailer. They are the same height and you have to look close to see the difference in the rim.  If those are your tires shown in rhe picture they look good and I would run them. Its not like you are going to overload them and run the 70mph all day .