4 Hercules road tour 455 M/S 225/55R18 98h tires

Four All season tires Hercules road tour 455 M/S 225/55R18 98h tires. Have sat in a garage for last 1.5yrs sheltered from the sun. I only changed tires because I wanted all weather tires. There are no patches or bulges. They were around $150 per tire new When I bought my vehicle I was told they were new tires...and to me when purchasing my car at the dealership they looked new. I purchased my car in April of last year and used them 5 months.