Join Date: May 2015
Location: Northern Virginia
Mentioned: 2 Post(s)
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Here's the deal with run flats, from my experience.
If you don't drive on them when they are below 15 PSI, and if the puncture is in the tread rather than the sidewall, they can be repaired.
If you have to drive on them below 15 PSI, the internal structures are compromised and the tire must be replaced.
I had one that had a nail in the tread, with a slow leak. I filled it to 35 PSI and drove it to the dealer, it lost maybe 10 PSI along the way. The service advisor got on Bridgestone's website and got the above information. They repaired it and I used it for the rest of the time I had the car (another two years or so) with no issues.
My situation isn't typical, though, so you're right about the tire and wheel package. I got it for mine too, just didn't have to use it that time.
2018 Q50 RS400 AWD Liquid Platinum
Sensory/All-Weather/Spiffy Splash Guards