The primary reason for buying a motorcycle helmet is safety and protection to your head in the event of an accident. To get the best protection your helmet needs to provide a really good comfortable fit. A bad fitting helmet can come off in an accident even if the chin strap is done up.
Getting the right fit
In order to find a motorcycle helmet with the correct fit, you should know your head size measurement before you buy any helmet. Here's the golden rule for finding a good comfortable fit:
Your head size + Your head shape = comfortable fit
How to take correct measurement of your head size (Guidelines)
First you need a small metal tape measure or a cloth tape to take your measurement. If possible ask someone to help you do the measuring in order to get a more accurate measurement.
Measure around the fullest part of your head just above the ears, taking the measurement at the forehead.
The circumference of the head should be measured at a point approximately one inch above the eyebrows or at whatever point gives the largest possible measurement.
Check the SIZE CHART provided for a correct custom fit.
21 1/2 - 22
6 7/8 - 7
22 1/4 - 22 3/4
7 1/8 - 7 1/4
23 - 23 1/2
7 3/8 - 7 1/2
23 3/4 - 24 1/4
7 5/8 - 7 3/4
24 3/4 - 25
7 7/8 - 8
Above chart is only meant as a guideline as different manufacturers have different sizing chart
Different brands of motorcycle helmet has different sizing chart for eg. 2 brands can have same size L helmet, but the sizing fit may be different due to shell size and thickness of inner padding and cheekpad.
The best motorcycle helmet fit is to try out the actual helmet product. The helmet size measurement will correspond to a particular size in the model range you are interested in. This is a good starting point if you want to buy a particular brand or model.
Know Your Head Shape
Although human heads have an infinite variety of shapes and sizes, most of us fall into these two categories:
Very narrow, 'long oval' head shapes
Very wide 'round' earth head shapes
Some of us may have a combination of these two head shapes. It's possible to have combinations of these shapes in an infinite number of variations.
Fortunately many motorcycle helmets are manufactured with internal shapes that roughly match these "oval" or "round" shaped head categories.
Different Head Shapes
Below are illustration of exaggerated human head shapes that is viewed from front or back of the head
Oval - sometimes known as "long oval", the most common head shape
Round - the round shaped head is wider in the middle, approximately near the temple
Egg - wider at the top and narrower at the bottom
How to choose the best comfort fit for your motorcycle helmet
Most important point to take note when you try out a motorcycle helmet sizing is to focus on the pressure on your forehead and top of your skull.
How to know motorcycle helmet is too small size for me
Overall fitting should be snug fit, however if you feel tightness on your forehead and high pressure on top of your skull then it is too tight and size is too small for your head. If you feel tightness on the cheekpads, it may be alright as the cheekpads may soften or expand after usage.
How to know motorcycle helmet is too big size for me
When you first try on the helmet, you do a test by shaking your head hard from left to right and if the helmet has space to wiggle that means the size is too big for you.
However exception must be made for those riders with oval, protruding head shape (European head shape), you may feel loose or space at the side of the helmet but your forehead can feel high pressure until red lines are pressed onto your forehead.
Why is it important to know your head shape?
It's important to know your head shape because you can roughly know which helmet brand and model will fit by matching your head shape to the helmet's internal shape. Not every helmet will fit the same and almost every helmet brand and model is different. Shape is one of the most important factors to understand when purchasing a motorcycle helmet.
Lower end motorcycle helmet
Lower end motorcycle helmet manufacturers tend to produce helmets with a generic shape that will fit most of the customers. The thickness of helmet inner lining, helmet cushion and cheek pads are the components that will make a difference to your fit.
Higher end motocycle helmet
Arai SHOEI is the only high end motorcycle helmet manufacturer that have developed motorcycle helmet models that are specifically engineered to fit different head shapes.
Always remember - there are different helmets produced in a range of sizes to satisfy a mass market. Your head shape and size are unique to you, so take your time to use the above tips when selecting your new motorcycle helmet.
There is no hard and fast rule when it comes to choosing the correct motorcycle helmet fit, This information is provided as illustrative purposes only and does not purport to show actual results. Ultimately you must feel comfortable wearing the motorcycle helmet. The best motorcycle helmet fit is to try the actual motorcycle helmet product. If your are unsure about motorcycle helmet sizing, you should always consult or seek advice from sales advisors who can help you in choosing the correct helmet sizing.
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