Originally Posted by Amanda

I had the Arai rep in this week for training. There is no law in the UK to replace a helmet, surprisely enough I found out today from a customer from Brasil that it is LAW to replace a helmet every YEAR!!!! Imagine that....

The recommendation is that you replace a helmet around the 4 year mark. The main reason for this is the break down of the inner shell. For example an Arai helmet has a triple density inner shell. Hard at the forehead going to softer on the crown. Sweat from your head penitrates this innershell making it hard all over. A firmer inner shell doesn't absorb an impact and spread the load as well as a multi-density shell.

Lesson over