Mongoose Legion L20 Freestyle BMX Bike, 20" Wheels, Kids Ages 8+, Black The Mongoose Legion L20 BMX Bike is the ideal kids bike for young riders ready to tackle the streets or skate park. Featuring a durable Hi-Ten steel frame with a 20.25" top tube, this boys bike offers a solid foundation for freestyle riding. The 8" rise handlebars and 48mm stem provide precise control, while wide aluminum rims and 2.3" BMX tires ensure grip and durability. With a smooth 25x9T gearing, 170mm cranks, and American loose ball bottom bracket, the Legion L20 delivers a reliable, high-performance ride for beginner BMX riders. View more from us on our brand page.