Originally Posted by
chefisaac
But the question is that can it be proved that the extra $100 is an improvement.
And it might be even less safe if it has a number of protrusions, like off the back, that can catch and stop a roll as you fall. This safety institute that tests helmets (or reviews tests) found no differences in performance between the expensive and cheap helmets:
http://www.bhsi.org/helmet12.htm They do recommend a rounder profile.