{"nhtsa_id":10189819,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-04-05","date":"2021-03-31","document_id":"P-21-01","mfr_campaign":null,"replaces":null,"component":"TIRES","mfr_system":null,"summary":"The purpose of this Technical Bulletin is to help Bridgestone and Firestone authorized dealers and fleet customers understand various tire heat contributing factors and the cumulative impact they can have on tire performance, and ultimately safe vehicle operation. 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