Helmets are perishable. They look pretty rugged but after a few years they start to deteriorate. You wear them (hopefully) every time you ride and they get hot and sweaty. You might leave one in the trunk of your car where it’s baked by the sun, or maybe you’ve dropped your helmet on the barn floor.
Most of us know that you should replace your helmet if you’ve had a fall where you hit your head. But did you know that helmet manufacturers recommend that you replace your helmet at least every five years?