cyclelicious said:If you've ever cracked a helmet landing on concrete you'll become a firm believer quick. Trust me, don't risk it.
Cracked mine 3 years ago on an f-in bike path, cruising home from a training ride. Crosswind took my front cosmic carbone out while I was screwing with my jersey zipper w/both hands. Mild concussion. Remember the crash, fuzzy for the hour preceding the crash - weird. Roller blader standing over me when I got my sh*& together.
Guessing it could have been much worse.
Good thing was the bike was OK.