Should I go with run-flat tires when I replace mine? I think I am going to go with the RSA's nex instead of the F1's, but it appears (by their website) Goodyear only produces them in a run-flat in my size (255/45/20). I have read that run-flats tend to ride bad. What are the pro's and con's, other than that you can drive a bit after losing air? BTW, I did a search of "run-flat", but couldn't find anything??? I searched "posts" and "threads".