runflat

Anybody running with runflats on 20's ?? My car is on 19" runflats with staggered wheels , it is occasionally a bit harsh but the security with runflats and no spare ( 2 sizes ) is an enormous bonus from punctures . We just bought a t6 sportline with staggered wheels on 20's with go flats ( pun...

Hi all.......can anyone settle an argument.......well, discussion actually. My brother has a 2008 BMW Z4 coupe with run flats. One of them (front) is bald. He's getting conflicting advice....some say fitting a conventional tyre is ok (but only if he also changes the other front at the same...