Originally Posted by
livedarklions
What exactly is the benefit of a hard shell? It's just more efficient at transferring the energy to your brain. That's not a good thing.
No points for comparison to motorcycle helmets, totally different probabilities because of speed. You need to point to something a bicyclist is likely to encounter where a hard shell would provide better protection.
BTW, the fact that no one sells a hard shell bike helmet even though it looks stronger (marketing appeal) reflects that the science is so clear on this that anyone selling them would be liable for the inevitable brain injuries that would result.
But see that would be where you are wrong. In a fall if your head would hit a sharp object it would go right thru todays thin candy shell helmets and the foam. With the lexan shell there would be no penetration and no injury.