detail view of a racing bicycle`s front derailleur

aluminum athletic axle bicycle bicycles bicycling bicyclist bike biking black brake carbon cassette chain closeup competition cyclist derailleur design detail equipment exercise fix focus front gear gears grease healthy leisure light macro maintenance marco mechanic metal metallic modern motion part pivot presta professional race racing rear recreation ride rims road rubber safety selective shift shiny silver slow speed spoke sport steel stop style technology teeth tire tool tour training tube valve vehicle view weight wheel