Acronym for Bicycle Motocross. BMX bikes are smaller, single-speed bikes made for people of all ages who enjoy riding, jumping or racing on dirt or riding on smooth surfaces. There are three major forms of BMX bikes BMX racing bicycles, Freestyle "stunt" bicycles and Dirt Jumping bikes.
Bicycle Moto Cross; stunt racing on a closed dirt track over obstacles.
BMX (Bicycle Moto-cross(X)) is a form of cycling on specially designed bicycles which usually have 20-inch wheels (sometimes referred to as iron horses or steel ponies). The sport includes races on earthern tracks—BMX racing—as well as the performances of tricks —BMX freestyle. Recently, BMX racing's international governing body—Union Cycliste Internationale (UCI)—began sponsoring the UCI BMX World Championships.