Anyways, POC Phil and i were having a lengthy discussion a couple months ago about helmets, and whether or not SNELL ratings were a bad thing. He had just read this article and was citing all sorts of data and experiments from it, so i went and googled the article up to repost here for your reading.
It's a VERY lengthy article, and i'll post what i consider to be an important exceprt at the bottom of this post, along with the link to the complete article, but the main fact i find very important is the following:
SNELL helmets have much stiffer padding inside the helmet, to comply with the standard set forth. Unfortunately it's TOO hard for the most typical type of accident ( ~25mph ) and as such doesn't cushion the softer blows enough. A number of SNELL approved helmets were run through the ECE ( european standard ) testing, and only a handful actually passed because the majority of them are just too hard.
Here's the segment i found most informative:
The COST 327 study investigated 253 motorcycle accidents in Finland, Germany and the United Kingdom, from '95-'98. Of these, the investigators selected 20 well-documented crashes and replicated the impact from those crashes by doing drop tests on identical helmets in the lab until they got the same helmet damage. This allowed them to find out how hard the helmet in the accident had been hit, and to correlate the impact with the injuries actually suffered by the rider or passenger. The COST 327 results showed that some very serious and potentially fatal head injuries can occur at impact levels that stiffer current helmet standards-such as Snell M2000 and M2005-allow helmets to exceed.
And remember, these guys are investigating crashes in Europe, where Snell-rated helmets are a rarity because they can't generally pass the softer ECE standard required there.
In other words, the latest relevant study, which used state-of-the-art methods and covered accidents in countries where there are plenty of 10-second, 160-mph superbikes running around, concluded that current standards-even the relatively soft ECE standards-are allowing riders' heads to be routinely subjected to forces that can severely injure or kill them. The COST study estimated that better, more energy-absorbent helmets could reduce motorcycle fatalities up to 20 percent. If that estimate is legitimate and was applied in the U.S., it would mean saving about 700 American riders' lives a year.
Here's the link to the article in full.
http://www.motorcyclistonline.com/gearbox/motorcycle_helmet_review/
⚠️ Last edited by Rover Eric on UTC; edited 1 time