John:
I think that depends on the race organization. Here in N.CA, the local club
CSRG allows SA2000 and of course SA2005. If one has an SA90 or SA95
certified helmet, those are not allowed since the could be over ten years
old and the helmets ability to perform properly is compromised. Since
SA2005 helmets are now available there is no reason to buy an SA2000 if a
replacement is needed.
The Snell Foundation updates their certifications every five years so the
next change will come in the year 2010. So if you buy an SA2005 helmet now,
it should be good for minimum five years.
Gary
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