also: じでんしゃ
I commute to school by bicycle every day.
I bought a new bicycle.
I ride my bicycle to school every day.
I go to the station by bicycle.
I parked my bicycle in front of the convenience store.
I got off my bicycle at the traffic light.
My bicycle broke down, so I took it in for repairs.
自転車 means 'bicycle' and shares the kanji 車, but it is a distinct vehicle from 車, which usually refers to a motor car.
barely keeping a business going; hand-to-mouth operation
bicycle trip; cycling tour