The ride started out pretty normal, but we did keep a pretty slow pace for the first several miles. We got cranking out on Lox road and after my pull at 28 I got to the back of the line and started to recover. Just as I was almost ready a girl in the middle of the line lost the wheel and started to drop. The two guys in front of me went around her as did I. We got up to 30 but by the time we caught up my HR was maxed again. So I ended up dropping shortly after that. The ride back on Lox started slow into the wind, but by the end we were up to 23 or so. When it got up above 25 I dropped again. We regrouped and rested at the park. As we left I noticed a "bump, bump, bump" coming from my left tire. I stopped and found I had a bubble in the center of the tread on the rear tire. I used a dollar bill to reinforce the tire and continued on solo. I went right to the park where Tyler was having his Cub Scout "Rain Gutter Regatta" He came in 2nd place in his division (Tigers) but I did see videos and I was there for his awards. He's come a long way since last year.