Emergency services were called to Evans Pass Rd in Sumner about 5.30pm on February 22 following a report of a crash involving a car and a cyclist.
Huntsman, a 60-year-old aeronautical engineer and Coast to Coast instructor, was cycling on Evans Pass Rd when the crashed happened near the intersection of Sumnervale Drive.
He was taken to Christchurch Hospital and placed in the intensive care unit with serious injuries, but he died in hospital on March 4.
"Our thoughts are with his family and loved ones," a police spokesperson said.
"Following a scene examination and further enquiries into the circumstances of the crash, Police have charged a 21-year-old man.
"He is due to appear in Christchurch District Court on 9 June, charged with dangerous driving causing death and failing to stop to ascertain injury."
