Police enquiries are ongoing to establish the full circumstances of the incident which happened on Wednesday, December 2 around 2.30pm near Boddam.
Two other vehicles were involved, a grey Seat Ateca car and a white Volkswagen Crafter van.
Neither of the drivers involved were injured
Support is being provided to Mr Cowie’s family at this time.
Sergeant Craig McNeill of the Road Policing Department said, "Our thoughts are with everyone affected and particularly with Robert's family and friends.
"I would urge anyone who may have information about the collision and has not already spoken to officers to contact police as soon as possible.
"We are particularly interested in speaking to anyone who saw Robert cycling southwards on the A90 around the time of the collision.
"Anyone with information can call 101, quoting incident number 1710 of 2 December."