The Turnbull Athletic Club (or Turnbull ACs) are a mixed-race, skin-headed gang who stress athletic fitness and are known to travel en masse in an
old green school bus. They are a large, violent gang, often armed with chains and two-by-fours. Their territory spans the central Bronx, and although their name would suggest it is based in the small working-class neighborhood of Castle Hill, their influence can be found as far north as Gun Hill Road in the neighborhood of Bainbridge (also known as Norwood). They are one of the most powerful and dangerous gangs in New York.
Their strength lies not only in their penchant for violence, but also in their sheer disregard for human life. Their reputation is such that they are known even to the
Warriors, a small-time gang from the other end of the city whose knowledge of other well-known gangs is repeatedly shown to be critically lacking. In the film, they wisely choose flight over fight, and even in the game they will generally only engage the Turnbulls when absolutely necessary.