does anybody know which cars run 12" 5,1/2j steel wheels

not a 100% sure but id guess a mini is that kind of size , also compomotive "i think" do wheels that size

Meik

daihatsu cuore some models

not 100% sure about the width, but that sounds right for a mk1 fiesta (or quite a few other cars that age...)

Hillman imp and early fiesta....