Thieves broke into a shed at a house in Belper and stole a valuable mountain bike from inside.
A black Norco Sight1 mountain bike was taken after the offenders removed the door from a shed at a house in Marsh Lane.
The 20-gear bike has a curved upper bar on the frame, Fox suspension forks on the front wheel and a mud protector fixed to the front of the frame, which has two eyes on it.
Police want to hear from anyone who may have information on the break-in or the whereabouts of the distinctive bike.
The break-in happened between 11.30pm on Saturday, May 10 and 3.10pm on Sunday, May 11.
Witnesses or anyone with information should call Derbyshire police on 101, quoting crime reference 19490/14.
You can also call Crimestoppers, anonymously, on 0800 555 111