According to New York bike shop Bicycle Habitat‘s website, the bikes themselves are typically made out of chromoly steel or aluminum. Aluminum frames are lighter and they’re also rustproof.

In addition to that, BMX bike frames come in a number of different sizes. As USA BMX notes, most stores and manufacturers should have frame sizing charts.

According to Mpora, BMX racing developed from a love of riding fast, so small bikes have always been a part of the sport. And seeing as the sport seems to have started out with riding through dirt paths, having good traction was always key. But since then, a bunch of different disciplines have developed the need for other kinds of options. Now, there are BMX bikes for flat riding, street racing, and more.