According to Bridgestone's motorcycle tire data book 2017 edition, page 44 (http://www.bridgestonemotorcycletires.com/2017databook/#44) , tires should be regularly inspected after 5 years of service and replaced after 10 years of service.
These tires have been stored in my heated garage since I purchased them.
These tires have been stored in my heated garage since I purchased them.