When should you replace your bicycle helmet? If you've been involved in a crash, then you should replace it immediately. There may be damage to the internal structure that is not evident from the outside, but could affect the helmet's ability to protect your head.
Otherwise, the time frame for replacing your bike helmet is affected by many factors, including age, exposure to sunlight and heat, storage conditions, and more. Consumer Reports talked to their own testers, manufacturers, and others to come up some recommendations in this article:
One of their top helmet recommendations is one of our best-sellers here at Century Cycles, the Giro Register MIPS!