The Giant E Bike was taken from LIDL car park in Colne Road on Saturday at around 7pm.
The suspect, who was wearing a ski mask, is described as an Asian male, and is around 6ft tall.
Anybody with information can contact PC Lees on [email protected] quoting Log 1444 of 7th May. Alternatively, Crimestoppers can be contacted, anonymously, on 0800 555 111.