The five-year replacement recommendation is based on a consensus by both helmet manufacturers and the Snell Foundation. Glues, resins and other materials used in helmet production can affect liner materials. Hair oils, body fluids and cosmetics, as well as normal "wear and tear" all contribute to helmet degradation. Petroleum based products present in cleaners, paints, fuels and other commonly encountered materials may also degrade materials used in many helmets possibly degrading performance. Additionally, experience indicates there will be a noticeable improvement in the protective characteristic of helmets over a five-year period due to advances in materials, designs, production methods and the standards. Thus, the recommendation for five-year helmet replacement is a judgment call stemming from a prudent safety philosophy.
Hair oils, body fluids and cosmetics, as well as normal "wear and tear" all contribute to helmet degradation. Petroleum based products present in cleaners, paints, fuels and other commonly encountered materials may also degrade materials used in many helmets possibly degrading performance
Just marked paint was the result. So tried it on the very top of the crown. Same thing - bounced up about 6 feet, and only a mark in the paint. And that's just a cheapo Box lid.
So other than the advances in tec and what and how much has the tec got better and how much tec is just marketing.
As long as it is EC22 marked, it'll probably give a reasonable level of protection I would have thought.
EPS is Expanded PolyStyrene Fazersharp
My £55 duchinni has that annoying stream of air flow up and over one eye. extremely annoying. I would think twice about air vents when I get a new lid
Quote from: midden on 22 March 2014, 10:14:02 pmMy £55 duchinni has that annoying stream of air flow up and over one eye. extremely annoying. I would think twice about air vents when I get a new lidNot being funny, but if you spend £55 on a lid, it's going to have some cost cutting measures as compared to a more expensive lid?
I read in a bike magazine ride or bike that it was 10years or 30k miles , I bought my Shoei raid 11 for £250 in 2007 and have done 22k miles so far, I'm planning to replace it in 2016 , I also bought a box flip front with a sun visor for £100 but only use it for shorter trips as it gets uncomfortable.