#car_wheel__carwheel  a wheel that has a tire and rim and hubcap; used to propel the car
  supertype:  wheel  a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
  subtype:  fifth_wheel.car_wheel  an extra car wheel and tire
  part of:  motor_vehicle
  part:  hub  the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes
  part:  hubcap  cap that fits over the hub of a wheel
  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

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