How to Size and Fit a Bike Helmet

You must wear a Bike Helmet that is the correct size and is adjusted to fit your head. Follow these simple steps and get the protection you need.

Supporting you and your family to SMILE when you ride.

Welcome.We all have different size heads so you can’t just guess size, you need to get a helmet that fits, not something that will just do. With one simple measurement you know you will have the correct size and then it is adjusting it to you head. Straps move so it is important to do a quick helmet check before each ride.

A quick pre-ride check , yes a helmet check that you do before every ride

  1. is it level – around the head, no tilting
  2. is it low – sitting just above the eyebrows
  3. is it snug – does it fit snug not tight on your head, are the v clips snug below your ears and is the chin strap snug under your chin
  4. is it stable – use the palm of your hand to check forward, backward, side to side movement, the movement should be no greater than 1-2cm

Helmet Size 

To get the right size helmet you must measure.  To do this place a tape measure around the head 1cm above the eyebrows and make sure the tape is level all the way around the head. Take the measurement in centimetres.  If you don’t have a tape measure use string or wool then lie this along a ruler.

Now match that head circumference (measurement) to the correct helmet size…

Womens Recreation Helmet Sizing Guide

Womens Mountain Bike Helmet Sizing Guide

Mens Recreation Helmet Sizing Guide

Mens Mountain Biking Helmet Sizing Guide

Helmet Fit 

How to adjust your Helmet so it fits snug on your head

Once you have the right sized helmet. Job done…. No!  That bike helmet will not perform and protect your head unless

  the straps are adjusted and fitted correctly

if the helmet uses different thicknesses of pads for fit (like a town helmet) you need to use the correct thickness of pads to get the optimal fit to the shape of your head

the occipital dial or slide is tightened

IT IS ESSENTIAL YOU TAKE THE TIME TO ADJUST THE HELMET TO FIT YOUR HEAD. THERE IS TOO MUCH RISK IN NOT DOING THIS PROPERLY… A HELMET WILL ONLY WORK CORRECTLY IF FITTED CORRECTLY.

STRAPS

There are different straps on different helmets but most commonly you have 2 straps attaching to each side of the helmet that come together forming a ‘V’ below the ears and are secured under the chin.

Adjust using the 2v2 rule.

  • 2 – the helmet should sit level on the head. The front of the helmet should sit no more than 2 finger breadths above the eyebrows.
  • v – the side straps make a V with the adjustable clip forming the bottom of the V just below the ear lobe.
  • 2 – you should be able to get a maximum of 2 fingers under the chin strap when fastened. The straps should not be twisted

PADS

A town style helmet often comes with two sets of pads, one thicker than the other.  Usually these pads are secured by velcro sticking to inside surfaces of the helmet shell.  You can take advantage of the pads to create a good match to the shape of your head.  This is important in town helmets that often have a single chin strap so need to have a firm fit onto the head.  Detachable and washable pads are ideal especially if you tend to sweat.

DIAL/SLIDE

Found at the back of helmets where your head meets the very top of your neck – this dial/slide when tightened or screwed in will secure the back of the helmet to the head.  This feature can often be upset in cheaper helmetsIt can be hard to find this feature in the cheaper helmets.

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