#bicycle__bike__wheel  a cycle that has two wheels; moved by foot pedals
  supertype:  #cycle.wheeled_vehicle  a shortened version of `bicycle' or `tricycle' or `motorcycle'
  subtype:  #bicycle-built-for-two  #mountain_bike  #ordinary_bicycle  #push-bike  #safety_bicycle  #velocipede
  part:  #bicycle_seat__bicycleseat__saddle  a seat for the rider of a bicycle
  part:  #bicycle_wheel__bicyclewheel  the wheel of a bicycle
     part:  #pneumatic_tire__pneumatictire__pneumatic_tyre__pneumatictyre  a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc
        part:  #casing  the outermost covering of a pneumatic tire
        part:  #inner_tube__innertube  an inflatable rubber tube that fits inside the casing of a pneumatic tire
     part:  #spoke__radiu  support consisting of a radial member of a wheel joining the hub to the rim
  part:  #chain.ligament  a series of (usually metal) rings or links fitted into one another to make a flexible ligament
  part:  #coaster_brake__coasterbrake  a brake on a bicycle that engages with reverse pressure on the pedals
  part:  #handlebar  the shaped bar used to steer a bicycle
     part:  #handle__grip__handgrip__hold  the appendage to an object that is designed to be held in order to use or move it
        part:  #shank.cylinder__stem  cylinder forming a long narrow part of something
  part:  #mudguard__splashguard  a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels
  part:  #foot_pedal__pedal__treadle__foot_lever  a lever that is operated with the foot
  part:  #sprocket_wheel__sprocket  thin wheel with teeth that engage with a chain

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