A cash reward has been offered to anyone who can safely return Daniel Weston's racing bike.
The Special Olympian won a gold medal in Abu Dhabi earlier this year, and is due to race at the Great Britain Nationals in less than two months.
The bike, worth more than £3,000, was stolen from a garage.
Daniel has autism and lives independently. His family say his bike is a 'lifeline'.
Outside of racing, Daniel works as a chef in the Barnstaple Hotel.
His employers have offered £300 reward for the safe return of the bike.
A crowdfunding campaign has started on JustGiving to raise £3,500 to replace the racing bike, wheels and heart monitor.