That's why I'm asking M8. I don't want run flats under any circumstances bar 1 particular option. The factory fit conti sport contact 2 on my alltrack have a gel insert. Not a true run flat. If you get a puncture the gel insert seals the tire. I can say it does work too. The contis have done over 35k but the alltrack is 4wd/AWD. Obviously being conti and offering a gel puncture resistance they are hellish expensive. Also as they have worn they have got very very rumbly, to the point I've had the car checked twice for wheel bearings and drive shaft uj's. And boy are those tires heavy. I don't know if the newer sport contact 5 is available with that gel insert. At conti prices, I've not bothered to look. I doing wish the other tire manufacturers would offer similar tho. Sent from my Pixel 2 XL using Tapatalk