Agreed. I have those exact same tires (Carslisle Sport Trail) other than the size and mine are 5 years old and look like new still. As I noted above I'm still replacing them because we're doing a big trip next month and they're getting old. As an aside, I'm planning on keeping one of my old ones for the spare. Since I'm replacing with radials, this would cause me to have one radial and one bias if I ever needed the spare. I know that's not recommended in general, but I'm assuming it's OK to limp home like that if necessary? Kind of like a compact spare on a normal car?