The 32-year-old man was riding along Lavender Road, Farnworth, when he was in collision with a Mercedes Sprinter at about 11:40am on 7 March 2023.
He was taken to hospital with serious leg injuries.
The driver of the van was arrested on suspicion of causing serious injury by careless driving and has since been released on bail.
Anyone with information about this incident or dashcam footage from the area at the time should contact GMP’s Serious Collision Unit on 0161 856 4741 quoting log 1168-070323.
Information can also be reported online or by using the LiveChat function at GMP Police website. If you can’t report online, call 101 or Crimestoppers anonymously on 0800 555 111.