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How to Properly Fit a Bicycle Helmet

It’s critical to have a bicycle helmet that fits, so it can protect your head during a bicycle accident.


  • Step 1: Determine size Use a measuring tape to measure your head’s circumference. This will determine the correct helmet size.
  • Step 2: Adjust foam pads Use the foam pads to make sure the helmet sits level on your head. Generally helmets come with two sizes of foam pads.
  • TIP: The helmet should sit low enough to protect your forehead, but not so low it impedes your vision.
  • Step 3: Adjust the straps Adjust the side straps to sit snugly under your ears with no slack. The chin strap should be buckled tightly under your chin.
  • TIP: It may take up to 30 minutes to properly fit and adjust the helmet. Don't rush.
  • Step 4: Open your mouth Open your mouth without moving your head. The helmet should pull down with your jaw movement.
  • Step 5: Twist the helmet Twist the helmet from side to side. The skin on your forehead should move with the helmet. If not, it’s too loose and needs tightening.
  • FACT: A bicycle helmet reduces the risk of head injury by as much as 88 percent during a collision.

You Will Need

  • A measuring tape
  • A bicycle helmet
  • Foam pads

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