Police were notified about the crash at the corner of Whincops Rd and Richmond Ave, Halswell, at 10.18am on Tuesday, March 1.
The cyclist, 81-year-old Gabrielle Bolt, was taken to Christchurch Hospital, where she died early today, police said in a statement.
Police said they were are supporting Mrs Bolt's family and all those involved.
An investigation is ongoing.