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Arai’s Quantum-X helmet

Posted By Bill Stermer #32290, Tuesday, January 7, 2020

Arai has always been known as a manufacturer of premium helmets, and with the elevated price range of the Quantum-X, you know you’re definitely paying a premium price here. As a motorcycle journalist, I have tested many dozens of helmets over my 40-year career and can attest that, in my experience, Arai helmets have always been impressive for their fit, finish, comfort, graphics and overall satisfaction.

One unique factor in Arai’s comfort level is that the company offers several interior fit configurations to address the range of human head shapes. The Quantum-X tested here features Arai’s Round Oval interior fit shape, which means it is shorter front-to-back and wider to the sides. For other models and their shape options, consult the Arai website ( Because of these fine distinctions among its various models, Arai recommends that, when it’s time to buy, visit a dealer and try on their various helmet models to determine your ideal fit.

Arai describes the Quantum-X as being made from a “peripherally belted, super-complex laminate construction shell design” that combines multiple materials and techniques created by Arai. It is basically fiberglass, but more than 20 individual materials are used in constructing the shell. This layering factor is useful in that it can often help in dispersing impact energy, and the helmet is thus certified to meet not only the DOT standard (required for all street helmets sold in the U.S.), but also the more demanding Snell standard.

The interior is deluxe, made of an anti-microbial synthetic material that allows the helmet to slide on easily and, when properly fitted, hug the head. Sealing the lower portion of the helmet is a waterproof chin guard that smooths the airflow and prevents wind or water from coming up.

Venting is quite functional thanks to a pair of controllable intake vents along the top, helped by a pair of adjustable exhaust vents in the rear. Fine tune the adjustable openings with their sliding controls and you’re sure to find a comfortable setting. The two-position chin bar vent is also quite functional, and in addition, there’s a pair of brow vents in the shield.

The only criticism I can offer regarding the Quantum-X is that its shield-changing mechanism is not intuitive. If you’re changing from your tinted to your clear shield at sunset, this factor can become crucial. To change the shield on this helmet, first raise it, push a lever to release each side cover, then pull off the cover to expose the shield pivot mechanism. At this point the shield simply pivots in its grooves; there is no clear indication as to how it releases. However, pushing the release lever further pops the shield outward so that the round, brass button on that side can then slide over and fit into a corresponding red circle on the shield mechanism. This allows it to be positioned so that it can be pulled out and popped off. And speaking of lenses, the Quantum-X is also packaged with a Max Vision, fog-resistant Pinlock lens that comes ready to install.

Reinstalling the shield is literally a snap. Position the brass button over the red dot on each side, raise the shield, and the two sides literally slide and snap into their proper tracks, so you’re good to go.

While riding I found the Quantum-X to be comfortable and very quiet. It fits and seals very well around the head, moves through the wind blast with minimal resistance, and its protrusions are so well integrated as to not create much wind noise. The graphics are first-rate and, overall, I find it a superior helmet.

Pearl Black costs $679.95, White $699.95, Black Frost, Aluminum Silver, Diamond Black, Diamond White $709.95, Fluorescent Yellow and all graphics $829.95, and all are available in sizes from XS – XXL. Find out more on Arai's website.

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