BMX frames are the foundational structures of BMX bikes, specifically designed to withstand the unique demands of BMX riding, which includes racing, freestyle, and dirt jumping. These frames are typically made from high-strength materials such as chromoly steel or aluminum, offering a balance of durability and lightness essential for the stunts and high-impact activities common in BMX riding. The geometry of BMX frames is distinct, featuring a compact design with a shorter top tube and chainstays, which enhances maneuverability and control.