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.


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You Will Need

  • A measuring tape
  • A bicycle helmet
  • Foam pads


  1. Step 1

    Determine size

    Use a measuring tape to measure your head’s circumference. This will determine the correct helmet size.

  2. 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.

  3. The helmet should sit low enough to protect your forehead, but not so low it impedes your vision.

  4. 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.

  5. It may take up to 30 minutes to properly fit and adjust the helmet. Don't rush.

  6. Step 4

    Open your mouth

    Open your mouth without moving your head. The helmet should pull down with your jaw movement.

  7. 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.

  8. A bicycle helmet reduces the risk of head injury by as much as 88 percent during a collision.