Police said the 29-year-old victim was approached by the group on Saint Nicholas Avenue in the Washington Heights section around 9:15 p.m.
One of the suspects struck him on the head with a baseball bat while a second struck him with a stick.
The victim was wearing a helmet, which protected him from being injured. He did not require any medical attention on the scene.
The victim ran into the building to escape the attack.
One of the suspects then struck his bike several times with the baseball bat.
It is unclear what was taken from the victim, and why the group chose to attack him.
Police are investigating, and are currently looking for all eight suspects involved.