On the car, I blew a front runflat tire 65 miles from home. I hit what looked to be a chunk of concrete that had popped up out of the roadway doing about 80 mph. With the speed limit being 70 mph for cars and 60 mph for trucks, I wasn't crazy going much below 55 mph. It was about 60 miles on the highway at 55 mph and then the last 5 miles is 40/35 mph through neighborhoods. It lasted me the drive home, but was definitely getting squirrely the last 10 miles or so and I definitely took it much slower off the exit ramp and turning in the neighborhoods.

Don't know what it would do to the X5, but that's why I have the spare tire kit and non-runflats now.

I have gone through 4 runflat tires in 2 years from the blowout, two sidewall punctures, and a pothole sidewall blowout. Prior to that, I think I have had 2 flat tires in probably 20 years. So far, just not impressed with the cost and frequency so I went with the spare tire kit and non-runflats which will all be put on next weekend.