Proper Helmet Adjustment and Fit

  • Always read and follow the owners manual provided by your helmet supplier.
  • Follow the sizing guide provided by the manufacturer to ensure correct helmet size.
  • This guide covers the use of helmets with common fitting mechanisms. But many helmets have different fit mechanisms that those described in this guide.
  • When riding, childrens' helmets should periodically be re-checked for tightness and positioning. Pay particular attention to any forward or backward shift of the helmet (see Step 2 below).


Step 1

Loosen the retention dial at the back of the helmet

bike helmet loosen dial

Step 2

Position helmet on the head so that the front of the helmet is just above the rider's field of vision.

proper bike helmet position

As a guideline, the front of the helmet should sit approximately two finger widths above the rider's eyes.

bike helmet two finger widths above eye sockets

CAUTION:  The helmet must not sit back on the head.

improper bike helmet fit

Step 3

Tighten the retention dial until the helmet fits snugly on the rider's head.

tighten bike helmet retention dial

Step 4

Adjust the helmet straps so that the "Y" sits just below the rider's ear.

bike helmet position y

Step 5

Adjust the chin strap so that it is snug (but not too tight) against the riders chin.  As a guideline (1) the strap should push against the riders chin when the rider's mouth is fully open and (2) you should be able to just barely fit three fingers between the chin strap and the rider's chin.

bike helmet chin strap adjustment

Step 6

Rider should shake head vigorously.  The helmet should remain snug and tight on the rider's head.

shake head to test bike helmet fit