How do the tests work? Each test involves placing a head
like object inside a helmet. The object is weighted and contains instruments to
measure the liner velocity and g-forces. They slide the helmet down a rail at a
high speed to strike an anvil which is shaped according to the specific test
being applied. After impact, the g-force enforced on the head like object is
measured and then the test is repeated on the impact point to make sure the
helmet can protect from multiple impacts.
DOT
DOT stands for Department of Transportation. This is the US
government approved standard.
DOT helmets are more shock absorbent and designed at protecting your skull from
90% of impact types. The maximum g-force allowed by the DOT test is 250g’s, and
an impact of 200-250g’s to your head would cause a survivable, yet harsh brain
injury. DOT helmets favorite shock absorbancy due to recent studies claiming
that absorbing the force of an impact is more important than resisting it.
Snell
The Snell Memorial Foundation is an independent organization
established in 1957, named after race car driver William “Pete” Snell who
tragically died in 1956 when his helmet failed to protect his head during an
accident. The Snell M2005 is the old standard favoring a more shock resistant
helmet while the more recent M2010 standard favors shock absorbancy. Snell
certified helmets are allowed for professional motorcycle racing, but the M2005
standard has no longer been permitted after 2011. The newly introduced M2015
standard is almost identical to M2010, but there is an important difference
regarding enforcement testing. When samples of previously certified helmets are
tested for compliance, the impact testing will be at the same impact velocities
and to the same criteria prescribed for initial certification testing. If a
failure is observed, three more samples will be tested at slightly lower
velocities, but the test criteria will be the same as those set for
certification testing.
M2015 certification labels are now available for sale as of
October 1st, 2014. The helmet models certified to M2015 are held to meet the
requirements of M2010 and will be included in the M2010 program upon request.
As long as no claims of M2015 qualification are made, such units may be
marketed with M2010 certification labels, M2010.
ECE
The ECE 22.05 helmet was made by the United Nations Economic
Commission for Europe, and is the most common helmet standard used
internationally used by over 50 countries worldwide. Helmets certified to ECE
22.05 are approved for all competition events by AMA, WERA, FIM, CCS, Formula
USA and MotoGP and are used by almost every professional motorcycle racer
competing in world championship road racing, motocross and off-road events. It
is very similar to the DOT standard as it favours a more impact-absorbent
helmet allowing a maximum g-force of 275. The ECE has more in common with DOT
than Snell, and is likely to pass the DOT test and vice-versa.
Remember, it’s your head you want to protect. So do your research and make your own decision on what type of helmet to wear. Let us know what you use in the comments below.
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