Started out this week with rides to and from work, still doing the Graves though (12 hour). 10 miles into work, and back again. Didn't get to ride Monday, or Tuesday. Got out today in the 90+ degree heat and after 22 miles felt something wrong with the back tire. I had an unusual "wobble". Got off the bike at a stop light and checked out my tire to find it horribly out of true. The Cause, 2 broken spokes . I have no Idea how they broke. Never heard them go, never hit a bump so hard that could have snapped them. Didn't have time to pull the tire before I had to head off to work again tonight. Hopefully I can get it torn apart and down to my LBS and get the spokes replaced. I may loose the rest of the week riding. POOP!