Protect your brain!! Biycle helmets do an outstanding job of keeping our skulls intact in a major crash. Ranging in price from $45 on up, it's a small price to pay for protecting your head. When should you replace your helmet? If you crashed, if the foam is cracked or damaged at all, if it's from the year 2000 or earlier, if it no longer fits.....NOW is the time!!! Look for the CPSC, ASTM or Snell sticker inside the helmet. If your helmet doesn't have one of these approved stickers it's time to upgrade.