Assuming that a helmet has had no knocks or other damage, how often should it be replaced?
Typically every three or four years. Polystyrene get brittle with age. It's usually in the small print of the leaflet that comes with the helmet, along with the bit that says it won't actually protect you in 'some reasonably foreseeable accidents', as the leaflet for my MET helmet puts it.
;; 'I think we should trust our president in every decision ;; that he makes and we should just support that' ;; Britney Spears of George W Bush, CNN 04:09:03
