Ключевые слова: accessory, active, adrenaline, background, bicycle, bicycling, bike, biker, bmx, boy, child, competitor, component, cross, curve, cycle, cyclist, dirt, dirt bike, downhill, drive, enduro, exercise, extreme, extreme sports, freeride, ground, jump, mountain, outdoor, person, protection, pump track, race, ride, risk, road, safety, sand, soil, sport, stunt, trace, track, trail, training, urban, vehicle, youth,