Shimano Headset
On Wednesday, May 17, 2017 at 9:40:00 AM UTC-7, Frank Krygowski wrote:
So in your case, I'm not saying don't ride your mountain bike on rough
trails. I'm saying keep in mind that your helmet is certified against
only a perfectly linear impact at about 14 mph.
And that impact is above the level that can cause a concussion.
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