What Size Mountain Bike Helmet Do I Need

Helmets are designed to protect your head in the event of a crash or fall. There are many different types of helmets and they have different features depending on what you need them for. The most important thing to consider when choosing a helmet is whether it will fit your head shape and size, and how much coverage it provides.

The best way to find out which size helmet you need is by measuring your head. You can measure the circumference around the widest part of your head with a tape measure, then use that measurement to find out what size helmet you need.

How do I know my helmet size?

SIZING: To measure your head size, wrap a tape measure horizontally around your forehead. Select the helmet that is the closest fit to that size. A helmet should fit snug on your head. If it moves while wearing, it is too large.^[1]

Should I size up or down helmet?

Choose the smaller size. Make customizations as necessary, such as twisting the dial fit system, removing fit pads and/or adjusting straps. A well-fitting bike helmet should be snug, but not too tight. It should rest level on your head and should not tilt back.^[2]

What size helmet is 58cm?

Helmets are available in sizes from 50cm right up to 67cm! If you are say 58.5cm and a Medium is 57-58cm and a Large is 59-60cm, we would generally suggest going for the smaller size as the interior will compress over time.^[3]

How tight should a bike helmet fit?

To fit and secure the helmet, tighten the ratchet system so the helmet fits snugly around the circumference of your head, with minimal movement when you shake your head, but not so tight that it feels uncomfortable. Remember, you’ll be able to adjust this on the go, too.^[4]

How do you size an adult bike helmet?

Take a soft measuring tape and wrap it around your head about one inch above your eyebrows and ears. Make sure the tape is level. Most helmets are measured in centimeters, so measure your head in centimeters if you can. In case you don’t have a centimeter tape, the conversion ratio is 1 inch = 2.54 cm.^[5]

How do you know if a bike helmet fits?

The helmet should sit LOW on your forehead. There should only be one or two finger-widths above your eyebrow. Your child should be able to look upward and see the front rim of your bicycle helmet on your own head. The left and right side straps should form a “Y” and meet right below your ear.^[6]

How do I know if my helmet is too small?

Try a helmet that’s too small first. Your kiddo will let you know it isn’t comfortable. A helmet that’s too small won’t be able to sit flush with the top of the head. A helmet too small will stop well above the ears before their head is finished rounding out.^[7]

Are bike helmets one size fits all?

Size it up: Lower-priced helmets are often one-size-fits all; you simply adjust an internal strap to get the helmet snug. Higher-priced helmets are available in a range of sizes. To learn what size you need, measure your head: wrap a tape measure around your noggin just above your ears.^[8]

What happens if you are between your helmet size?

Numerous sources recommend to – if stuck between two sizes – take the smaller size as “helmets should fit tight”. In addition, one has to expect that any helmet will wear in and get a little bit wider over time…^[9]

Can you use a mountain bike helmet for road biking?

Yes, Mountain Bike Helmet is suitable for road cycling. When you don’t need high speed and don’t want or don’t have enough money to buy a second helmet you can use it for both uses.^[10]

What size is a 50 cm helmet?

One brand will have a Medium size being the equivalent to 54 – 58 cm, while another brand will show Medium size as being 55 – 60 cm.^[11]

How big is an XL bike helmet?

Helmet manufacturers are not compelled to follow a standard sizing protocol, so as a result, the XL bike helmets from one manufacturer may be 66cm (26 inches), while an XL bike helmet from another manufacturer may be only 64cm (25.2 inches).^[12]