Took my nephew Nate out to Milestone on Sunday morning before the game. He hadn't been on the bike for while because he broke his leg last year. When he heard I was going he asked if he could tag along. His dad said it was cool so we loaded up and took off. Anyway, about five laps into his day I noticed he had a flat front tire so I called him in so I could fix it. Unfortunately the valve stem was broken and not a tube to be found. But he still wanted to ride so, he put in about a hundred laps with a flat front. Crashed a bunch but I think he still had a good time.