The outer shell of a mountain bike helmet consists of polycarbonate plastic, fiberglass or carbon, with the inner shell made from expanded polystyrene foam. They offer maximum protection for the trail rider, offering more coverage to the back of your head than a recreational helmet. More than 500,000 people receive treatment each year for bicycle accidents, with 900 of these injuries resulting in fatalities, according to the U.S. Consumer Product Safety Commission. Proper replacement of a mountain bike helmet ensures continuing protectionon the trail
Step 1
Replace your mountain bike helmet after an accident. Although you may not see the apparent problems, unseen damage reduces the protective capabilities of the helmet.
Step 2
Replace your mountain bike helmet every three to five years. Exposure to the ultraviolet rays and the elements can weaken the inner and outer shell of the helmet.
Step 3
Place a tape measure 1 inch above your eyebrows and above your ears and measure around your head. Keep the tape measure level from front to back to obtain the circumference measurements of your head. Provide the measurement to the bicycle shop associate.
Step 4
Purchase a mountain bike helmet with small vent holes. Larger vent holes could allow twigs and small rocks to penetrate the helmet. Purchase a single-construction helmet with the inner and outer shell molded together, as a two-piece helmet could come apart during impact. If you need a visor, buy a helmet with a breakaway visor.
Step 5
Try on different mountain bike helmets to the find one that fits properly. A proper fitting helmet sits level from front to back and when twisted, causes the forehead skin to twist with it. The helmet should not roll forward or backward off the head.
Things You'll Need
- Tape measure
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