The more Shinozaki became obsessed with biking, the more he pushed himself to the brink is such an shounen anime to do, especially when he has a specific goal. ADD kid would know the feeling. I also enjoy the fact how supportive the club members are of him considering his quirky behavior. when compared to the person he was at the first episode, we really do feel happy for him, and that is reflected by Shinozaki thinking of others in return instead of driven by his ego.