Symbolic of your ability to move in life.
If the tire is flat it symbolizes your inability to go anywhere
If you dream of having a flat tire (whether on a car or bicycle), this foretells problems caused by hidden jealousy - try being tactful for a while and controlling your feelings.
To dream of changing a tire is a warning to conserve your resources against an unexpected need. Buying a new tire predicts a sudden release from worry.
To dream of losing a tire suggests that you would benefit from a season of stricter self-control.