This is one of dozens of suspected bike thieves being sought by British Transport Police (BTP).
The images, taken from CCTV at Leeds railway station, were among 30 released by BTP in a bid to crack down on the problem across the north of England.
It is alleged the suspect, who was wearing red gloves, took a bike from the cycle racks at the station before riding off along Aire Street on September 3.
Chief Insp Derek O’Mara said many bike thieves used the rail network to travel around to target stations.
He added: “Officers investigating each of these cases have followed multiple lines of enquiry and circulated these images on police intelligence systems to try and get names for these people, but to no avail so far.
“We’re now asking for help from members of the public to identify them.”
He added: “Thieves should be aware that the majority of cycle racks are now monitored by CCTV and patrolled by plain clothed officers so the likelihood of getting caught is high.
“We will continue to work closely with Network Rail and the train operating companies to tackle cycle crime and passengers should report any suspicious behaviour to a member of staff or police.”
Anyone who recognises the man pictured should contact BTP on Freefone 0800 405040.