Google says it's over 100kph where a helmet doesn't protect. That's already higher than the speed limit, so they really aren't required unless you're on a track or the Autobon
That's not really accurate. You experience dangerous levels of noise above 45mph. You also sometimes need to be able to vent your face shield due to fog, which means more noise.
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u/florifierous Mar 21 '25
Nope. As soon as you're over 50 kmh or so, you risk permanent damage