One key element is the dirt bike culture. It's central to the story.
The relationships between the characters are important. They support and sometimes conflict with each other, which is a big part of the real story. Also, the conflict with the authorities over the dirt biking activities.
The real story in 'Charm City Kings' has several key elements. Firstly, the dirt bike culture which gives the young people in Baltimore a sense of purpose and belonging. Secondly, the family dynamics of the main characters. Some have absent parents or are dealing with family issues. Thirdly, the community aspect. How the dirt bike riders form a community among themselves, sharing their passion and facing the outside world together. And finally, the struggle against the system, as they are often seen as troublemakers by the authorities just because of their love for dirt biking.