Good Sam Community

Hello from Northern Alberta does anyone know what size 16 is same or close to the 8.00 x 16.5s on my old 79 Dodge Mini home.we have 9 tire shops in town 4 are very big brand names not one could tell me??? trouble is there all run by young people ...

like some info on this old Sprite Alpine S trailer. year it is. any original sales pictures and info. https://i.imgur.com/ijRzFlM.jpg