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Arai Quantum-X Spine Helmet


Got a roundish melon? Arai has got you covered with the Arai Quantum-X Helmet.



Arai Quantum X Spine Helmet

The name Arai has been synonymous with quality and protective technologies since the beginning of their days and the Quantum X Spine Helmet continues to push the bounds, proving why Arai stands at the top. The Quantum series has been the go to helmet for riders with a more round headshape and this stays true with the Quantum X, thanks to its balanced length and slight additional width. With the simple installation of a Corsair X head liner, the Quantum X can even be converted to fit those with an intermediate oval headshape.

The Arai Quantum X Motorcycle Helmet features a chin curtain that helps to block air intrusion from the turbulent air underneath the helmet, as well as increases negative pressure to enhance the exhaust ventilation performance. The interior lining includes Arai’s signature 5mm peel away ear pocket padding and ear pocket recess to accommodate communicator speakers.

VAS Shield System:

Normally the shield mounting position must remain relatively high, because a lower shield pivot will not allow the shield to open or close. The VAS (Variable Axis System) has a variable axis (moving pivot point). This allows shield opening and closing even with the 24mm lower shield mount position, compared to the RX-Q.

VAS Shield Latch System:

VAS shield latch system captures and holds the shield closed more securely to help prevent unexpected opening. In addition to a de-mist position, the larger latch design allows for an intuitive and seamless operation of the shield.

PB-SCLC Shell:

The new Peripherally Belted – Super Complex Laminate Construction shell design combines multiple materials and techniques created internally by Arai that deliver both performance and affordability.

Arai’s Proprietary Liner:

The fully removable interior liner system is made from odor resistant material, which helps maintain neutral acidity levels close to human skin, as well as a softer liner material and adjustable temple padding to allow for a customized fit.

VAS V MV Shield:

The VAS MAX Vision shield is standard to provide better visibility in all seasons and for all types of riding and comes standard with a clear anti-fog Pinlock insert.

Additional Features:

  • VAS (Variable Axis System) shield and side pods are exclusive to the Arai Quantum X Helmet
  • Dual function lever releases both the side pod and the face shield for quick and simple face shield removal
  • VAS shield latch system captures and holds the face shield closed and provides a de-mist position to slightly crack the shield open
  • VAS MAX Vision face shield provides excellent visibility in all seasons thanks to the included Pinlock insert
  • Neckroll is removable and has additional exhaust channels to remove interior heat
  • Cheek pads have the Emergency Release Tab feature
  • QVF & QVR upper ventilation ducts look familiar but offer more adjustment and better flow through performance
  • PB -SCLC Shell has superb tensile strength due to a variety of carefully-positioned materials and light weight resin
  • Includes clear Pinlock insert
  • Snell 2020 and DOT approved
Black/White / XS 1808156 685311181022 Only 1 Left: Ships within 24 hours
Black/White / SM 1808157 685311181039 Only 1 Left: Ships within 24 hours
Black/White / MD 1808158 685311181046 In Stock: Ships within 24 hours
Black/White / LG 1808159 685311181053 In Stock: Ships within 24 hours
Black/White / XL 1808160 685311181060 In Stock: Ships within 24 hours
Black/White / 2XL 1808161 685311181077 Only 3 Left: Ships within 24 hours
Black/Red / XS 1790860 685311181084/886469 In Stock: Ships within 24 hours
Black/Red / SM 1790861 685311181091/886470 Only 3 Left: Ships within 24 hours
Black/Red / MD 1790862 685311181107/886471 In Stock: Ships within 24 hours
Black/Red / LG 1790863 685311181114/886472 In Stock: Ships within 24 hours
Black/Red / XL 1790864 685311181121/886473 In Stock: Ships within 24 hours
Black/Red / 2XL 1790865 685311181138/886474 Only 2 Left: Ships within 24 hours
XS / Black/Hi-Viz Yellow 1790866 685311181602/886475 In Stock: Ships within 24 hours
SM / Black/Hi-Viz Yellow 1790867 685311181619/886476 In Stock: Ships within 24 hours
MD / Black/Hi-Viz Yellow 1790868 685311181626/886477 In Stock: Ships within 24 hours
LG / Black/Hi-Viz Yellow 1790869 685311181633/886478 In Stock: Ships within 24 hours
XL / Black/Hi-Viz Yellow 1790870 685311181640/886479 In Stock: Ships in 1-2 business days
2XL / Black/Hi-Viz Yellow 1790871 685311181657/886480 In Stock: Ships within 24 hours

Arai Helmet Sizing


2XS 51 – 52
XS 53 – 54
SM 55 – 56
MD 57 – 58
LG 59 – 60
XL 61 – 62
2XL 63 – 64
3XL 65 – 66


Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How to Measure

  • HEAD
    Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.

Additional information


Black/White, Black/Red, Black/Hi-Viz Yellow




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