Tricks done on a bmx bicycle .
That bicycle is very suitable in accordance to your height.
The word BMX stands for Bicycle Moto X, with the X being short for cross.Apart from that I don't think a BMX is considered an established symbol for anything. Freedom to ride, crash and scrape your knees perhaps.
The true origin of BMX was nothing more than kids on bicycles, typically Schwinn Stingrays, mimicing their motorcross heroes on small dirt dunes. But in 1973, Yamaha made a bicycle specifically for that purpose. It was called the Yamaha Moto-Bike. In 1974, BMX was sanctioned into it's own type of sport with the creation of the "National Bicycle League". This same year saw the first bicycle frame made specifically for BMX: The Redline Squareback.
The initials used for Bicycle Moto-Cross are BMX.
bmx
bmx is usually rendered as "bicycle motocross" in French
Bicycle Moto Cross
bicycle motocross
BMX
A BMX stem is what connects the handlebars and forks to the frame.
the answer is BMX.