The victim was making a delivery for a company in Riley Close when two men approached him from behind.
They pulled him to the floor and banged his head on the pavement while he was wearing his motorcycle helmet.
The attackers then stole his bag which contained cash and cigarettes.
The victim suffered minor cuts and bruising to his face.
The incident was at around 10pm on Monday.
The first offender has light Asian coloured skin, is about 5ft 10ins tall and of chubby build.
He was wearing a plain black hooded top with the hood pulled up and black jeans.
The second offender was wearing a white and red chequered bandana across his nose and mouth and spoke with a slight Asian accent.
Police have appealed for witnesses to come forward.
Anyone with information should call PC Thomas Booth on 101 or Crimestoppers anonymously on 0800 555 111.