Aug. 22, 2022, 10:05 a.m. -  Andrew Major

I can logic through what you’re saying assuming both helmets are made the same way of the same material and the actual contact point is the covered by the half-shell. It’s anecdotal, and may even be terrain specific (steep jank / greasy sport surface) but what I was trying to say is a lot of my friends on-bike concussion experiences have come from contacting the ground with part of their face their helmet was not covering.  My guess is as specific research of mountain bicycling concussions increases we’ll see that a lot of them actually come from the impact of folks slamming their jaw/chin into the ground.  The old “I got a concussion and my helmet is fine” is not always be because said lid was too hard or under-sphericalled. Rather I think sometimes (often?) it’s because there was no helmet contact (again, 100% anecdotal based on a small sample size riding the North Shore) ——— Based on hockey and football research I also wouldn’t be surprised to see the UCI mandating mouth guards for DH and EWS racing in the future. Imagine how well that will go down? Hahahahaha