Originally Posted by
Six jours
The helmet is less useful in bike-auto collisions because fatal bike-auto collisions usually involve multiple massive injuries. That doesn't, of course, mean that no one has ever had his life saved by a helmet in a bike-auto collision. I just don't see significant objective evidence that it happens very much. If bicycle helmets really were effective in such scenarios, then why would motorcyclists and car racers wear such big heavy helmets?
"Usually?" Sometimes, of course. But "usually" - I have heard that before but I haven't seen any stats that support it. Have you?
I do know that there are a lot of fatalities in bike-auto collisions due to traumatic brain injury. A helmet is useful in those cases.
As for why motorcyclists wear heavier helmets than cyclists, you know why.