Twenty tyres were stolen from a Boston tyre-fitting business last night.
Lincolnshire Police said thieves cut a hole in a fence at the London Road premises to gain access sometime overnight to this morning (Friday).
Both new and part-worn lorry tyres were taken.
Anyone with information should contact Lincolnshire Police by dialling 101 and quoting incident number 73 of March 21. Report crimes anonymously by contacting Crimestoppers on 0800 555 111.