I got my Mondeo 5 years ago and it came with steel wheels. It needed new tyres so I got some aftermarket alloys. They are cheap wolfrace 16" alloys and seem pretty soft. I have rimmed 2 sets now on potholes here in Surrey.

I still have the string wheels. I need new front tyres anyway. Can I run steel on same axle (front or back?). Apart from looking a bit odd it should be ok right?

Would you put steel's on front or back?

As long as the tyres sizes are the same, as they should be anyway, I don't see that it matters - many alloys weigh about the same as steels so no issues there and many cars used to get a full-sized steel spare, and had to use it sometimes.

That's the sort of modification that you need to tell your insurer about.

Just run the steel wheels as the odds are if you put alloys on one axle one will find a pothole sooner or later! I did used to run wider steels on the back of two cars in the late seventies/early eighties but that was quite common then. Also since we have gone from looking up the premium on a chart with seven groups vs age any modification seems to attract quite an additional premium!