Wife's car had a tyre that kept going down, from 2.0 bar down to 1.4 bar within a relatively short space of time so obviously that was replaced. I was looking at picking up a spare wheel since the car (BMW X3, F25) doesn't have run flats - I'm sure it was meant to have them from new but it doesn't now and I'm not bothered about changing the tyres. Since she doesn't often go that far, the spare would live in the garage rather than being in the boot all the time unless I'm taking it on a long drive or it's going out of the country.
Rather conveniently, a mate has given me an identical wheel with a couple of minor scuffs on and a Pirelli tyre fitted with plenty of tread left, but it's a run flat. I'll probably never need to use the spare wheel but if I did, would it be an issue driving the car with 3 normal tyres and 1 run flat tyre for a short period of time? By that I mean just to be able to drive home or to a tyre place rather than to leave it on the car for a few weeks. I can't see it being a problem but just want to check to see if anyone knows any different.
Obviously the ideal would be to just get another alloy with a regular tyre on it but as this one has cost me nothing and will probably never end up being needed I'm not sure it's worth splashing out to change the tyre.