make that n=3
I have always rode with a helmet even back before it was the norm. I had one instance where the helmet likely saved my life. I was mountain biking on a trail near my house and took a pretty bad spill. I landed on my head and was unconscious for 4 days. The helmet acted as it should have, absorbing the impact and preventing severe head injury. It was a long recovery but I did recover. I can't understand those that think avoiding the use of safety equipment makes sense. While the helmet is rarely necessary, when it is necessary it could mean the difference between life and death.