Thieves have made off with £40,000 worth of bikes and equipment.
The raid took place between June 17 and 18 at Bike Seven on Sandilands business park, Longtown.
A Cumbria police spokesman said: "Approximately £40,000 worth of bikes and related equipment have been stolen."
Police are asking anyone with any information or witnessed the incident to please contact 101, alternatively, call Crimestoppers anonymously on 0800 555 111.
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