sentence: A man removes the front tire of the bike from the frame. sentence:  The man replaces the tire on the front rim and pumps it up. sentence:  The man reinstalls the front tire onto the bike frame. sentence:  The man shows an electric piece of equipment then fastens it to the seat post. sentence:  The man removes the handlebar grips and slides on electrical controls. sentence:  The man installs a headlamp to the bike.