Police are searching for four stolen mountain bikes together worth around £5,000.
All were taken from a garage on Belgrave Mount in Claremount, Halifax.
They were a Whyte Steel 19 (with markings F002E0056 10B-09), a Rocky Mounting Slayer 30 (markings 2006000827), a Genesis Core 20 (with markings TH60601567 DB 6) and a custom-built bike.
Police are urging anyone who is offered one or all of the bikes to buy to get in touch.
The theft happened overnight between November 11 and 12.
Anyone with information should call Detective Constable Anil Seepujak in Calderdale CID on 101.
Information can also be given anonymously to CrimeStoppers on 0800 555111.