Well it looks like my fears of the 345/30 18 becoming extinct have come to play. I'd been watching the Tire Rack stock for months now. Well I went on a couple of days ago and noticed that they pulled the size. I went on the Michelin site and they are gone as well. Big bummer! I know the Kumho's are cheaper, but I'm weird. I won't put Kumho's on a Viper, the Michelin tire was designed for the Viper. I've heard of some neg. comments about the Michelins, but they worked great for me. I liked the additional tire O.D. as well over the 335.