BMX bicycle

BMX bicycle

[‚bē‚em‚eks ′bī‚sik·əl] (mechanical engineering) A small, extremely strong, type of bicycle, having generally 20-inch (500-millimeter) wheels, large-cleat (knobbly) tires, upright but not high-rise handlebars, and a seat positioned more towards the rear wheel than on a conventional bicycle, and used for stunt riding and tricks.