aerial
air
bike
chain
combustion
competition
competitor
cross
cycle
danger
engine
extreme
fly
fmx
free
freeride
freestyle
gear
grip
health
internal
jump
leisure
lose
loser
male
motocross
motor
motorbike
motorcross
motorcycle
motorsprot
mud
race
rider
risk
safety
scramble
speed
sport
stunt
transport
trick
tyre
tyree
vitality
wheelie
wild