Snell Helmet Safety Standards:
http://www.smf.org/stds.htmlHelmets, from a safety point of view, are about the same IF THE HELMET HAS BEEN PASSED BY SNELL. Snell rating meet and exceed the Federal Specs (Snell demands the right to actually test the helmet before approving it. The Federal Spec require no such actual test, just meeting the federal specs and self policing.
2010 Motorcycle Snell test requirements:
http://www.smf.org/standards/m/2010/m2010_final.htmFederal Bicycle Specs:
http://www.bhsi.org/standard.htmComments on the various specs (More on Bicycle helmets then Motorcycle Helmets):
http://www.bikehelmets.com/konfuciy.asp?tda=dt&t=12892&fs=bicycle+helmet+standardsSnell was the big name in helmets till the mid 1990s. The problem was Snell insisted on the right to test helmets Snell purchased at retail (i.e. NOT supplied by the company except as the manufacturer puts into retail stores). To get a Snell Sticker, the maker of the Helmet had to agree to leave Snell buy up to 10% of that company's helmet at retail and reimburse Snell for the cost of such purchases in exchange for the Snell Sticker (Which Snell could demand they pull if Snell in its test finds out the Helmet, as sold, do NOT meet Snell's Specs).
Helmet companies hated this rule of Snell and demanded the Federal Government issue its own specs, which the Government did. Snell modified its specs to be more in line with the Federal Specs, but still insists on testing. Thus a Snell approved helmet is considered better then a DOT approved helmet. Helmets are built to meet both set of specs (Which are almost the same) but with Snell approval the Helmet is subject to actual testing by Snell, while the Federal Government leave such testing up to the Helmet manufacturer.
An anti-Snell Article I ran across while looking for articles on Helmets:
http://www.motorcyclistonline.com/gearbox/motorcycle_helmet_review/index.htmlI put it here to show that there is a dispute even among experts as to what is a "Safe" Helmet, Snell demanding a stiffer helmet then DOT or European helmet safety groups. The article question the need for such high safety margins, but I tend to like Snell on this argument.
Another site that is Anti-Snell (Helmet sellers hate Snell, it increases their costs do to how Snell tests helmets) but it has the actual Federal Department of Transportation (DOT) regulation regarding Helmets.:
http://www.webbikeworld.com/motorcycle-helmets/DOT-standard.htmOther Articles of Modular Helmets:
http://www.motorcyclecruiser.com/accessoriesandgear/flip_face_helmet_comparison/index.htmlList of Snell Approved helmets (No Modular has made the list, I suspect because none of the Makers of the Modular want their helmets to be actually tested):
http://www.smf.org/