The death of a man who was fatally struck by an SUV while riding a bicycle in the Lower West Side late last month was ruled an accident Saturday, according to the Cook County medical examiner’s office.  A Jeep SUV struck the still-unidentified bicyclist in the 1900 block of South Union Avenue on Oct. 27 around 4:14 a.m., according to Chicago police. The Jeep’s driver fled the scene.  The unresponsive bicyclist was transported to Stroger Hospital with a head injury, police said. He died there Wednesday evening.  An autopsy performed Saturday showed that the man died due to complications from “craniocerebral injuries” from a motor vehicle striking a bicyclist and was ruled an accident, according to the medical examiner’s office. The medical examiner’s office said the victim was 64 but has not released his identity. A police spokesperson said Saturday that no suspects were in custody and that the police’s Major Accident Investigation Unit was investigating.