Ключевые слова: active, activity, adventure, bicycle, bike, chain, components, cycling, design, details, engineering, exercise, fitness, gear, gearbox, hiking, hobby, hub, innovation, integration, lifestyle, maintenance, mechanical, mechanics, mechanism, mountain, movement, outdoor, parts, pedal, performance, purple, recreation, rider, road, shift, shifting, speed, sports, style, system, technology, touring, trail, transport, transportation, tread, urban, wheel,