Different tyres on same axle

[AceKid]

Hi all,
Recently fitted new Pirelli p zero PZ4 (runflats, 245/45/18 100Y XL) on the rear of our 2016 530d touring, literally done about 50miles since fitted. wife took the car up to Legoland today and suffered a puncture on route, she managed to get a new Pirelli fitted, but when she got home I see its a P7 cinturato and 96Y rated.
Question is, other than playing with my OCD, will this cause any issues?

[AceKid]

stevieturbo said:

And is the new tyre a runflat ?

Should have said, yep new one is a runflat too, apparently she went to ATS first and they just wanted to fit a cheap non runflat, at least she didn't agree to that.

[AceKid]

Panamax said:

I'm confused. A car on runflats had a puncture and immediately needed a new, non-matching tyre?

Nothing confusing, it got an unrepairable puncture and as with any tyre it needed replacing, she was told they were fitting a P zero, but once home I saw it was a P7 instead. If she had been local, then it would have come home and I would have ordered up the correct replacement to go on, but as she was a good few hours from home, she had to get it sorted there and then

[AceKid]

Panamax said:

You've missed my point. It's a runflat, so why couldn't she drive home on it?

As I said in my reply, she was a good few hours from home, and when runflats are meant for a max of 50mph and 50 miles, that wasn't an option

[AceKid]

E-bmw said:

I have to admit if it were me I would have ideally matching all 4 corners or a minimum of matching tyres front & matching tyres rear.

Having said that the load rating is maybe the bigger issue than the tyre type, as above does it need to be 100Y?

I couldn't agree more about having matching tyres, but considering I just spent £400 on a pair of new tyres 2 weeks ago and then the wife has spent another £200 yesterday, I'm loath to spend yet again!

I checked the tyre spec sticker on the door shut, minimum rating is for 96Y on the 245/45/18 size, so at least its still ok

[AceKid]

Panamax said:

Only if you believe the guff pumped out by people keen to sell you another £250 tyre at the first sniff of trouble. I've driven on punctured runflats and had them repaired, with full tilt vulcanised repairs as may be necessary. The tyres suffer no damage at all if you keep them sensibly inflated.

When the tyre fitter removes the tyre he can see from the condition of the inside of the tyre wall whether the tyre, conventional or runflat, has been knackered by being driven "flat". It's one of the reasons why "plug repairs" are frowned upon in Europe. There's no point sticking an external plug in a tyre with knackered sidewalls.

The above is great, but if you are over 150 miles from home and need to get it sorted the same day within the area that you are, then you have to make do with what you can get. If she had been local, then I would have said drive home and then have time to ring around and try other options, but that wasn't the case.