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Arai Defiant Chronus Helmet
  • Arai Defiant Chronus Helmet - Black
  • Arai Defiant Chronus Helmet - Black
  • Arai Defiant Chronus Helmet - Red
  • Arai Defiant Chronus Helmet - Red
  • Arai Defiant Chronus Helmet - Yellow
  • Arai Defiant Chronus Helmet - Yellow
  • Arai Defiant Chronus Helmet - Green
  • Arai Defiant Chronus Helmet - Green

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Video Reviews (4)

Arai Defiant Chronus Helmet Videos

Arai Defiant Chronos Helmet

Detailed, precision clock like inner workings hide beneath the surface of this new design. The Chronus graphic look sharp from a distance, but offers surprising detail up close for those who appreciate attention to fine detail. 

Designed specifically for the aesthetics and needs of street fighter and naked bike rider in mind, the Arai Defiant Chronus is equally aggressive and feature rich, as one would expect from a new Arai helmet. Based on the fit and comfort of the Quantum, the Defiant was built for the upright riding position with its aggressive, integrated chin spoiler, which was designed specifically to guide wind around the neck and to improve the aerodynamic properties of the helmet. The Hyper Ridge Bumper circles the bottom of the shell both adding additional strength and also lowering the helmet's center of gravity, while flaring the helmet opening slightly to increase the ease of putting on, and taking off.

The Arai Defiant utilizes Arai's latest faceshield design, the SAI Max Vision Pinlock Shield with Brow Vents and includes Pinlock insert lens. The SAI Max Vision shield has been widened by 5mm left and right and offers one of the widest eyeports available for excellent peripheral vision.  


  • Aggressive new styling
  • Internals are redesigned with a focus on safety and comfort
  • Organic shell shape for superb energy management
  • New IC-4 Upper Intake vents seal more completely when closed
  • New ACR-4 flow thru exhaust vent allows greater air flow when open and reduces drag when closed
  • FCS R (Facial Contour Support) cheek pad design has 5mm peel away micro fit layer for greater personal fit
  • Cheek pads feature contoured shape, multiple density foam layer supported by a patented spring
  • New shell shape is easier to put on and take off
  • New water repellent material along bottom edge
  • Pull down spoiler works with new flared bottom to increase helmet stability
  • SAI Max Vision Brow Vent Pinlock anti-fog lens insert included
  • DOT and Snell 2010 certified

Arai Helmet Sizing:

Wrap a cloth measuring tape around your head just above your eyebrows. Pull the tape comfortably snug, and read the length.

Size Head (in) Head (cm)
2XS 20 - 20 1/2 51 - 52
XS 20 7/8 - 21 1/4 53 - 54
SM 21 5/8 - 22 55 - 56
MD 22 1/2 - 22 7/8 57 - 58
LG 23 1/4 - 23 5/8 59 - 60
XL 24 - 24 3/8 61 - 62
2XL 24 3/4 - 25 1/8 63 - 64
3XL 25 1/2 - 26 65 - 66

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

Click here to see the full Arai Helmets Size Chart

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Product Style RevZilla Item # Manufacturer Product # Availability
Black / 2XS 939740 818759 In Stock: Ships next business day
Black / XS 939741 818760 In Stock: Ships next business day
Black / SM 939742 818761 Out of Stock
Black / MD 939743 818762 In Stock: Ships next business day
Black / LG 939744 818763 In Stock: Ships next business day
Black / XL 939745 818764 In Stock: Ships next business day
Black / 2XL 939746 818765 In Stock: Ships next business day
Black / 3XL 939747 818766 In Stock: Ships next business day
Yellow / 2XS 939748 818769 In Stock: Ships next business day
Yellow / XS 939749 818770 In Stock: Ships next business day
Yellow / SM 962711 818771 Out of Stock
Yellow / MD 962712 818772 In Stock: Ships next business day
Yellow / LG 962713 818773 Out of Stock
Yellow / XL 939750 818774 In Stock: Ships next business day
Yellow / 2XL 939751 818775 Out of Stock
Yellow / 3XL 939752 818776 Out of Stock
Red / 2XS 939761 818789 In Stock: Ships next business day
Red / XS 939762 818790 In Stock: Ships next business day
Red / SM 939763 818791 Out of Stock
Red / MD 939764 818792 In Stock: Ships next business day
Red / LG 939765 818793 In Stock: Ships next business day
Red / XL 939766 818794 In Stock: Ships next business day
Red / 2XL 939767 818795 In Stock: Ships next business day
Red / 3XL 939768 818796 In Stock: Ships next business day
Green / 2XS 939753 818779 In Stock: Ships next business day
Green / XS 939754 818780 In Stock: Ships next business day
Green / SM 939755 818781 In Stock: Ships next business day
Green / MD 939756 818782 In Stock: Ships next business day
Green / LG 939757 818783 In Stock: Ships next business day
Green / XL 939758 818784 In Stock: Ships next business day
Green / 2XL 939759 818785 In Stock: Ships next business day
Green / 3XL 939760 818786 In Stock: Ships next business day


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We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

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If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

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Arai Defiant Chronus Helmet 4.7 5 123 123
solid Nice as any Arai. The extended chin bar works as advertised. I think it's the best looking helmet in the Arai line. I have no idea why they don't put padding over the chinstrap like on every other helmet I've had. It becomes irritating unless I set it on the loose side. The eye port curves upward at the periphery and makes head-checking harder but I'm coming from a dual sport helmet with crazy visibility. It's not loud or quiet. There's a breezy noise all the time - not bad. Vents like a champion. Overall a good buy, mean looking helmet, high quality with some typical Arai design gimmicks: funky face shield, harsh chinstrap, dopey retractable chin spoiler, etc. It's a keeper. November 25, 2015
Great Helmet Best fit of any helmet I have owned! Fantastic quality. Great airflow. November 9, 2015
Great Helmet I love this helmet, from the ventilation, visibility, weight, style, comfort and protection. If you can afford it buy it. October 22, 2015
Excellent Choice, but a little too much airflow After riding about 1000+ miles with the Defiant, I am very pleased with my purchase. Previously I had a Snell rated helmet but the feel, comfort, and weight of the Defiant is light years ahead of the other helmet, which was a great helmet too. I live in Colorado so the weather varies. Currently fall is upon us which makes for cool mornings and hot afternoons. The Defiant works in the varying conditions well and the Pro-Cruise shield helps me transition from early morning to the day with no problems too. The Pinlock shield is works beautifully as the shield has not fogged up once sitting at stop lights. The only issue I have, and it's likely just a personal preference, but the airflow is almost too much in the cool mornings, even with all vents closed and the shield locked. I have found a work around though, by wearing a thermal head liner. Overall this is a great helmet and would recommend it to anyone. October 21, 2015
expensive but good This is my first high end helmet. I like the style, vision out the visor. I first bought the Shoei RF-1200 but exchanged it for this one because the head padding in the Shoei was not fixed and it would move in such a way that it would block the air intake vent holes. The Arai has much better venting and living in the Houston area it is really hot during the day. Couple of things that I don't like: The visor is hard to flip back up once locked down. I usually don't lock it down and just ride with it cracked. The padding around the cheeks is pretty tight. I peeled away the 5mm layers that are designed to come off and they are still tight. We'll see if they break in more over time. I like the chin strap. It doesn't rub or irritate my neck. Then venting is nice, especially the temple vents. Noise level is okay but I've really determined a lot of noise comes from turbulence around you. I ride a suzuki m50 with a screen and if I stand up on my pegs on the highway and put my head in clear air it's amazing how quiet everything gets. The pull down chin thing feature is a joke and does nothing. Arai would have been better off adding a good wind curtain like the rf-1200. Overall its a good helmet. The price is high though. October 19, 2015
You get what you pay for. This helmet is comfortable, if you are going to be wearing a helmet for any extended period of time, most helmets start to have pressure points that will start to bother you, even when properly fitted. This isn't the case here. It is also surprisingly cool due to fantastic venting. If you are more interested in protecting your head than saving a buck I would recommend this helmet to anyone. October 5, 2015
This a great helmet!!!! No need to carry 2 visors. The shade feature is excellent and has great visibility. Helmet is very comfortable and fits great. The only concern I have is when using my Sena 20s, the speakers do not sit far enough in without bothering my ears. I had to modify the depth to make them fit better. I called Arai to see if the 15mm cheek pads have a thinner base, but they said that the only difference is the thickness of the removable pads. Other than this, this is an excellent product. September 22, 2015
Insane Air Flow. I have this helmet for 2 months now and it is very different from anything I ever had. Air flow was mindblowing first time I got up to 50 mph. Air blows from every angle and and sometimes straight into your eyes. You cannot completely seal this helmet. Even with all vents closed there is more airflow than my Shoei RF1100. This is great helmet in the summer at moderate speed but I can't imagine wearing this helmet on a long trip. Dark visor screen works good when it's down but makes noise at higher speed if you have it lifted. I don't ride without earplugs. Styling is superb. If it matters, I get a lot of compliments. Interior is very luxurious and has by far best feel from any helmet I use. There is only one pressure point on my forehead that feels uncomfortable after about an hour. Other than that very good fit. If you like lots of Air in your face this is your helmet. If you ride in cold days like I do, make a pass or use this as a second helmet. September 17, 2015
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Arai Defiant Chronus Helmet
Already Asked: 1 Question, 4 Answers
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RevZilla Store asked: Why did you choose this?
M S: The Arai brand Nov 8, 2015
Michael T: best helmet I have ever owned. formerly a Shoei guy, but after wearing the Arai for just 1 day I could tell the difference in quality. weighs a few ounces less that the Shoei and my head never buffets around - awesome aerodynamics even at 120+ Sep 1, 2015
Andrew B: I ride a naked bike and was looking for a top quality helmet designed for my specific riding needs. Jun 18, 2015
Robert H: It's an Arai with great graphics and at a decent price. Jun 8, 2014