Our latest ATGATT conversation got me thinking about how I protect my grape. How often should a helmet be replaced? I know they are good for one crash. Mine has not been subjected to such but it is around 3 or 4 years old. The word affordable helmet caught my eye. What is the best value? I've heard the argument, how much is your head worth? I would like to know what is the best protection for the money. I was trying on helmets at the local Triumph store and I know I need at least a XXXXL. 3X was to small. So that limits my options as well. Your help is appreciated. Thanks.