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Arai Quantum-X Helmet

Item: P350057

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

$611.96 - $629.96
$679.95 - $699.95
Save $67.99 (10%)
Price depends on product options. Make a selection to update price.
Learn More

Product Details

Shape: Round Oval
What's this?

Arai Quantum X Helmet

The name Arai has been synonymous with quality and protective technologies since the beginning of their days and the Quantum X 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.

Eco Pure Liner:

The fully removable interior liner system is made from Eco Pure material, which helps maintain neutral acidity levels close to human skin and antibacterial consumption, 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 2015 and DOT approved
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Product Description
Got a roundish melon? Arai has got you covered with the Arai Quantum-X Helmet. Read More
Part Numbers
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Shipping & Returns
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Reviews & Questions

4.7 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
6
3
0
0
0
Bang For The Buck
4.2 / 5
Protection & Durability
4.8 / 5
Features
4.6 / 5
Comfort
4.9 / 5
Style
4.7 / 5
Air Flow
4.6 / 5
Fit
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3 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
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5 / 5
Best Street Helmet EVER!!!
I have owned Arai helmets for over 30 years. That said, whenever its time to buy a new helmet I do the full spectrum of shopping but keep coming back to Arai. I am glad they chose to make a top-of-the-line street helmet as opposed to a pure race helmet. It predecessor the RX-Q was the first helmet that was really neutral in that you could turn your head at speed and not have the wind catch the helmet and try and snap your neck. The Quantum X has fixed most the issues I had with the RX-Q (face shield swap and noise) and returned the round helmet size that had been lacking since the Quantum S was dropped several years ago. For me, having a round helmet really does limit me to what helmets fit. Now if they could only bring the price down, but you can't have everything. Bottom line, great helmet, excellent fit, top quality and would buy another one without reservation.
February 3, 2017
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Fit
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True
Large
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4 / 5
Seems Worth the Expense
I've tried helmets from Shoei and Biltwell, and I must say the Arai takes the prize on being my favorite.

I ordered the Quantum-X in Pearl Black and first noticed that the fit was very comfortable all around. The quality is noticeably above and beyond the other two manufacturers. The look of the Pearl Black is pretty sweet, too.

The face shield comes with a Pinlock insert lens which was convenient. Removing and replacing the face shield was really easy as well.
December 17, 2016
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
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5 / 5
Perfect Helmet for Round Head
If you have a round head, this is the perfect helmet. There are few choices that will fit a round head and this one is one of the best helmets you can get. They are hand made in Japan by craftsmen who really want to protect your head. The build quality is excellent. This is a very comfortable, very protective helmet. Properly fitted, it is a squeeze to get your head in but then it opens up and cradles your head. This results in less air noise around your neck because of the tighter opening.
April 27, 2017
Purchased
8 months ago
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
4 / 5
Fit
Small
True
Large
Shape
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Weight
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5 / 5
Great Comfortable Helmet
I switched over from a tired Shoei RF-1100. The fit and finish of Arai is far beyond any offering I've seen. I love how comfortable this helmet is. I also love the lack of buffeting, and how balanced it feels on my head. My only gripe is the wind noise. It is the same if not worse than my RF-1100. I would recommend this helmet to anyone with a rounder head.
April 7, 2017
Purchased
10 months ago
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Shape
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Weight
Light
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4 / 5
You can't go wrong with Arai
I decided to upgrade from a Vector 2. I chose the Quantum X because I really couldn't justify spending the big bucks on a Corsair X. Still, this is the most I've ever spent on a helmet but those of you who've already been converted, know that you're getting the best in terms of comfort, materials, interior adjustability, build quality, fit and finish. In my case, the Quantum X fit better than the Signet X. The biggest improvement is the new shield removal system. It's so much easier than the old system that I will forgo the wonky Pro Shade system and keep a clear shield in my topcase for when I need it. I wear eyeglasses and the "round oval" provides more space on the temples and reduces the pressure points I felt with the Vector 2. Arai gets added points for including a Pinlock-ready shield and anti-fog insert in the box. Arai Americas also has great customer service if you ever have a problem or just want to ask them a question. If I had to take away points, it would be the new shield latch, which is difficult to operate right-handed. With that being my only complaint, I say well-done Arai!
May 4, 2017
Purchased
7 months ago
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Shape
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Round
Weight
Light
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Air Flow
5 / 5
amazing airflow, very confortable, all washable
Loving this helmet.
The airflow is amazing. I drive in LA and here the sun in a monster.
Is truly confortable, easy to disassemble to clean.
June 18, 2017
Purchased
6 months ago
Bang For The Buck
4 / 5
Protection & Durability
3 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Shape
Narrow
 
Round
Weight
Light
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3 / 5
Comfortable Helmet!
Pros:
Very well balanced and comfortable helmet.
Seems to be quieter than others.
Arai is a name you can trust your safety with.
Well made.
Quality materials.
Improved airflow from previous versions (I owned previous version).
Cons:
High Price
Matte paint already has chips after only 3,000 miles
March 12, 2017
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
4 / 5
Style
4 / 5
Fit
Small
True
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Weight
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5 / 5
Clamps on my head like a giant octopus!
Replacing my very tired Shoei RF1100, this helmet just fits better on my German head. It is hard to get on, but once there it clamps in place and there is no shifting no matter how I turn my head even at speed. The pinlock visor that came with it is pretty impressive as well. In my old bucket I think my full beard interfered with flow-through. If I yawned, or coughed it would fog up. Not in this helmet. Noise is a bit less than the Shoei was. There is a bit of buffeting at speeds greater than about 70 mph, but I only ride with a small sport shield, so that's to be expected, and quite tolerable. I've had issues with other "new" helmets from other vendors having consumed much of their recommended 7 year shelf life before I got them. Not this one! Date of manufacture is 12/2016 which means it is covered for the entire 5 year warranty. All in all I am extremely happy with this helmet, and it still has that "New Helmet Smell!"
July 8, 2017
Bang For The Buck
3 / 5
Protection & Durability
5 / 5
Features
3 / 5
Comfort
5 / 5
Style
4 / 5
Fit
Small
True
Large
Shape
Narrow
 
Round
Weight
Light
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Air Flow
5 / 5
Very good, could be less noisy
I am coming to Arai QV pro from Schubert. The looks of the helmet (stint version) is striking and the first impression is very good. In particular, the quality is very good. I have some issues though:
Lets start from the cons ;-)
- coming from Schubert, the Arai QV Pro feels noisy (from the airvents). This is some trade off against safety I guess. Use earplugs on longer trips!
- on a first day one of the plastic eyebrows on the visor literally fell of and went astray. Good that Arai provided me with this thingo at no cost and was easy to install.
- you need to install the pinlock otherwise you will see the fog quite often
- the way it opens (formula one thing) is sometimes cumbersome. needs some training from the rider.

Pros:

- the visor is very wide and gives a perfect vision almost as in open face helmet even with the pinlock
- top safety rankings
- aerodynamics seem very good, you can turn your head at almost any speed and there is even less feel of wind than when looking straight ahead.
- there is a lot of ventilation
- it does not feel heavy
- it gives a feel of safety
- sun shade is quite clever
- comfortable lining
- quite easy to dismantle and mantle if you know what you are doing
- paint looks great
- fast after sales service

There isn't many touring helmets with dot, snell and sharp ratings. Thus the choice is not wide, but this one will be great once you put earplugs in. Therefore 4 stars out of 5! Look for discounts!
September 26, 2017
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 17 questions Browse 17 questions and 27 answers
Why did you choose this?
RevZilla Store
Seemed like a good thing to do
Peter N on Aug 25, 2017
Few helmets offer a "Round/oval" head shape option. I liked Anthony's explanations.
Anthony W on Jul 28, 2017
Seemed like a good thing to do
Peter N on Aug 25, 2017
Very comfortable and great for people like me who have bowling ball heads! Very quiet!
" " on Jul 31, 2017
Few helmets offer a "Round/oval" head shape option. I liked Anthony's explanations.
Anthony W on Jul 28, 2017
Fit and safety
Rebecca B on Jul 11, 2017
I wanted one of the best. How much is your head worth?
Troy R on Apr 28, 2017
High user ratings
Carlos B on Apr 25, 2017
Proven arai quality. I only have one dome
Robert W on Apr 22, 2017
I mistook it for the Signet X, because they both end in "X", and "X" is easier to remember than Signet or Quantum- words I've never said out loud.
Justin G on Apr 8, 2017
I have a very round head. I tried the HJC CL-17 based on reviews that this was good for round heads. It was uncomfortably tight in the temples. The only helmets I found that fit my head properly were the Bell Bullitt and Arai Quantum X. The Quantum X is very expensive, but very protective, well made and comfortable. This made it the only option and I'm thankful to Arai for offering it.
Matt P on Apr 5, 2017
The shape and quality of Arai helmets.
Gerard C on Mar 21, 2017
It fit my head and was the most comfortable.
Gable G on Feb 23, 2017
I've been very satisfied with prior Aria helmets whether used for daily commuting though 3 seasons (above 40F) or on prolonged sport touring / adventure rides covering thousands of miles.
Stephen S on Feb 21, 2017
I have a round head shape, so my choices are limited to the Shoei Qwest and the Arai Quantum. The Quantum gives me the option to add on their external sun visor which is very helpful when I commute in the mornings. The Qwest didn't have any kind of visor option.
Michael N on Nov 2, 2016
Very comfortable and great for people like me who have bowling ball heads! Very quiet!
" " on Jul 31, 2017
Fit and safety
Rebecca B on Jul 11, 2017
I was told the Arai shields do not block UV rays. True?
Brian C on Oct 3, 2016
BEST ANSWER: Arai says: "All of the Arai shields are 96-99% UVA and UVB protected but we advise that you still use a sun block if you are sensitive to the sun’s rays and will be riding for a longer period of time."
If your measurement ends up being in between sizes, what is the recommended size, the smaller or the larger of the two?
A shopper on Oct 23, 2016
BEST ANSWER: The smaller of the two. Nearly any helmet will break in over time, and you can also purchase a thinner liner if necessary to free up some space. A tighter helmet will be safer than a looser one as well.
Are cheek-pad kits available for the new Signet-X and Quantum-X?
A shopper on Oct 4, 2016
BEST ANSWER: The Aria Americas website implies that you should use the Corsair X cheek pads with the Quantum X and Signet X.
What is the weight of the Quantum-X (in a medium)?
Atalla N on Feb 3, 2017
BEST ANSWER: I have a medium in silver. I just weighed it as 1614 grams (3 lbs 8.9 oz)
I am currently using vector 2. Would the quantum x fit my head?
Melvin R on Jan 17, 2017
BEST ANSWER: Depends if you found the helmet too oval or too round. For me the Vector 2 fit barely but the Quantum fits fetter due to my round head. If your are more oval then try the Signet X.
Does this come with a good carry bag?
David D on Aug 6, 2017
BEST ANSWER: Just an average soft-cloth drawstring bag, like most manufacturers provide.
Hello. What is the standard size liner for an Arai Quantum X size large?
Bruce H on May 7, 2017
BEST ANSWER: Large is 7mm liner.
Is the Quantam X good for upright riding? How does it compare with the Pro Cruise?
Mitchell K on Nov 23, 2017
What is the size of cheek pads does the XL quantum x have?
A shopper on Oct 20, 2017
10 Customer Reviews
10 4.5/5
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16 Questions & 14 Answers
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