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Helmets: How old is too old?

Joined
Aug 31, 2007
Messages
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Location
Beaumont, Texas
First Name
Ken
Last Name
Phenix
I've heard the liner material in helmets starts to deteriorate after 5 to 7 years. I'm trying to figure out the actual age of my helmet. It has a M2000 Snell rating so I'm sure it's still safe and I have really enjoyed having my head in it almost every day for the last 2 years but I just want a new one. Does anyone know how to read Shoei's top secret production date code?
My TZ-R's production date stamp is: HH040729
 
Manufactured in July '04. I replace them when the lining gets ratty or funky.
 
I've always heard replacement is strongly encouraged at the 5 year mark or after impact.

However... I have friends who replace more frequently due to desire, which I don't believe is a bad thing.
 
I've always heard replacement is strongly encouraged at the 5 year mark or after impact.

However... I have friends who replace more frequently due to desire, which I don't believe is a bad thing.

Thanks, I agree. The online dealer where I bought my new RF-1000 today (production date: May 2006) explained that a new unit can safely remain in the box up to 7 years and then be used up to 5 years from the date placed in service. That explanation could be used by a dealer to justify selling old stock.
I know sanctioning bodies of most forms of motor sports require a current Snell rating. Since I'm not planning on doing any empirical research on helmet age and diminished impact absorption, the Snell foundation's 5 year standard is good enough for me.
 
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