repair of mountain and road bikes. rear wheel and cassette close-up on a black background. replacement of worn-out spare parts

bicycle bike sport gear wheel cycle chain transportation metal transport cassette broken steel equipment technology background part sprocket speed vehicle drive cyclist repair transmission cycling machine circle detail object component gearwheel ring old black road tire closeup biking brake lifestyle mtb group fix spare service crash tooth hand freewheel freehub mountain bikes rear close-up background replacement worn-out parts