all mystery holes except one sliver of glass... nothing in the tire, not even any noticable cuts... the tire apear intact still... although they will become tires for the trainer. The flats were split evenly, 2 front, 2 back!

Arizona is tough on tires... I get a flat about ever 200-300 miles of riding. I use slime tubes and heavier tires with more puncture resistance when I train, and that has reduced my flats significantly! I will be changing my tire and tube choice for Wisconsin, I will hopfully have new wheels and be riding tubulars on race day <img src="/images/graemlins/grin.gif" alt="" />