How Should A Dirt Bike Helmet Fit?

No matter how much money you spend on a helmet the fact is if it doesn’t fit you correctly your safety will be severely compromised. We have a complete motocross helmet sizing guide but read on as we have snipped just the helmet section out for you to make things easier!

The easiest way to explain this is you want your helmet to feel snug, a helmet which fits you correctly will be tight around your cheeks, if your teeth are catching some of your cheeks while you talk with a helmet on that is perfect. Also check the back of the helmet where the base of the helmet meets the back of your head, this should also be a snug fit so if you can fit your fingers in between here the helmet is too big!

When ordering online knowing your measurements is going to be your biggest advantage, all helmets are sized in S (small), M (medium), L (large) increments. There is a range of CM measurements associated with each size too.

To accurately measure your head, use a cloth tape measure wrapped around your head horizontally about one inch above your eyebrows and ears, take the CM measurement of the circumference of your head.

Every helmet size will cover a range of 1cm. See below a size chart to make this clearer:

Adults Helmet Sizes:

  • XS (extra small) 53-54cm
  • SM (small) 55-56cm
  • MD (medium) 57-58cm
  • LG (large) 59-60cm
  • XL (extra large) 61-62cm
  • 2XL (2 extra large) 63-64cm


Kids Helmet Sizes:

  • Small 47-48cm
  • Medium 49-50cm
  • Large 51-52cm

Please note: Always aim to get a tight fitting helmet, if you fall between sizes round the size down, not up. The exception to the rule being kids helmets as they are growing you would be safe to round up to the nearest CM to allow for room to grow. Everyone has a slightly different shaped head, and most helmets are a slightly different fit from brand to brand. Try as many on as you can until you find a brand which is the right shape for your head as the better the fit, the safer the ride!

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