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Proper Fitting Technique
After many, many years of listening to riders, we have found that helmet satisfaction starts with understanding helmets. Most importantly, understanding how proper fit affects helmet performance during everyday riding, and how that comfort extends to the helmet's interior shape.
This is why Arai has gone to the considerable effort to design, create, and offer three different interior shapes. (Arai does not believe that all-day comfort can be achieved by trying to stuff every different head shape into a single helmet interior shape.)In order to offer the most comfort, a helmet interior must fit snugly around the entire head contour. (This is partly determined by firm, even pressure at all contact points, and without pressure points that could become uncomfortable in the future) A previous helmet of the same brand, model and size - even if an Arai - may not offer the same fit as a current model or size because the evolution of design and use of new materials can affect the final design and shape. (For example, such advances and refinements have made the interior shapes of our new RX-7 Corsair and Quantum-2 models able to fit more riders than their immediate predecessors, the RX-7 RR4 and Quantum/f.)
Attention must also be paid to the fit of the model¹s shape around the crown of your head - and not with facial fit. (The part that is contacted by a baseball cap's band, for example, is the crown) Cheek pads in all Arai helmets can be replaced with a size that better suits your facial structure, so the possible need for different cheek pads should only be addressed after the crown is properly sized. All too often, tight OEM cheek pads will result in purchasing a helmet one or even two sizes too big - in effect sizing the face and not the head! The end result will be a loose and noisy helmet, as described above. (Riders with a strong jaw or heavy cheeks should first remove the cheekpads completely in order to not be distract- ed in determining crown fit.)
Arai Sizing Chart
This chart should only be used as a starting place to determine helmet size. Final judgment should follow actual test fitting of one or more interior fit packages to determine the best possible fit 'for you'.