Ummm, how do you wear out a bike helmet? Heavy thinking? ;-)
Took a spill and it saved my noggin , it got scratched up pretty good. Down time due to other medical items ( Non bike related ) over a year. Set asides for a while in the heat and humidity down here , got mildewed. Had it in the workshop with the other bikes . Recently when looking it over I made the decision to get another. Figured it was time to upgraded helmets then to try cleaning the old helmet and using it. These new helmets are a world of difference from the old ones especially in the weight of them , a lot lighter.