I just ordered two 145/70-12 nankang snow sv-2 winter tyres to replace worn out tyres.
I dont like these nankangs much, the no longer available yokohamas were better. But there isnt much choise in 12inch winter tyres.

Does any of you know the widths and et measurements of available mini 13inch steels?

i've never seen 13" steel wheels for minis, only aluminium

The ones i think about was from a newer mini or perhaps a clubman and had oval holes in them. But maybe they were only 12 inch

i'm pretty sure they were only 12".
there were 3 differend part numbers, NAM6696 and NAM8480 for 4.5x12 ET34, and NAM6071 for 4.5x12 ET35.
i don't think the factory ever bothered even thinking about 13" steel as it was only considered for looks