I'm new to the motorcycling world and the first purchase I'm going to make is a good helmet. I want to buy a "flip-face" helmet. I read that I need to make sure it'll stay on my head by performing a "roll-off" test before I buy. What's a "roll-off" test and how's it conducted?
Quote from a wise friend, "if you have a $10 head, buy a $10 helmet".