You guys all know I love Rockstar's Bully, right? I've written at length about how great it is, and how I wish that more games were set in high school. (As an addendum to that article, I am finally (finally!) playing Persona 3 Portable on the Vita, and I am loving the crap out of it.)
Anyhow, this music plays whenever Jimmy hops on a bike, and while there may be more rockin' tunes on the soundtracks, it'll always mean Bully to me. The entire soundtrack, composed by Shawn Lee, is amazing—hopefully if Rockstar makes a sequel, they'll enlist Lee to work on the game.