Thanks to everyone for the great help. I'm not sure I need new tires yet...but others have suggested that Z rated tires wear out much faster than others. They don't look too worn to me...but then again I've been known to take a tire down to the steel belt before I had any idea there was a problem (I'm a driver, not a mechanic!). I already took her up to 140mph when I first got her, so no real need (place) to do that again...will rarely see 120mph.

But with the long "Left Coast Hookup" on the 15th, I'd hate to spoil the ride (and the wallet having the thing towed 100+ miles) with a blown tire if they're near the end of their life.

Again, thanks for the responses and good information, as usual. I'll probably see what the dealer says, too...and I agree that I am rather spoiled with my current Michelens...I may give in just to get it done. Thanks again...will let you know what happens.