> I can't find a reference with a short Googling, but as I recall helmets only help in a fairly narrow window, something like 18-23 mph or so I'd really like a

> I can't find a reference with a short Googling, but as I recall helmets only help in a fairly narrow window, something like 18-23 mph or so I'd really like a citation on that. I'm into motorcycles and while helmet design is different, every motoGP season has plenty of examples of riders tumbling at +100kph and walking away after.