Mongoose has been in the dirt, down the trails, and on the ramps. With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L20 was designed to be a full park, street, and dirt-worthy BMX bike. The Legion L20 features a Hi-Ten steel frame (20.25 top tube), tapered headtube, and removable brake mounts.