The 52-year-old man who was hit by a ute while riding his bike along Springhill Road early this week has died in hospital.
Police said the man, who suffered serious head and chest injuries in the Tuesday incident, died about 3pm on Friday.
Witnesses called emergency services just before 7am with reports of a serious collision between a white Holden Rodeo dual-cab ute and the bike rider at the corner of Springhill Road and Keira Street.
Six ambulance crews were dispatched to the scene, including the NSW Ambulance Toll Rescue Helicopter with a specialist medical team.
The rider was airlifted to St George Hospital in a critical condition.
The male driver of the utility was arrested and taken to Wollongong Hospital for mandatory blood and urine testing.
Officers from Wollongong Police District along with the Traffic and Highway Patrol have commenced inquiries into the circumstances surrounding the incident and are appealing to anyone who saw the crash on Springhill Road or has dash-cam footage, to contact police.
Police will prepare a report into the man's death for the information of the Coroner.