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Arai Defiant Chronus Helmet
  • Arai Defiant Chronus Helmet  - Black
  • Arai Defiant Chronus Helmet  - Black

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Video Reviews (4)

Arai Defiant Chronus Helmet Videos

Shape: Intermediate Oval

Weight: 3.73 lbs

What's this?

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

Size Head (cm)
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

H 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.
Product Style RevZilla Item # Manufacturer Product # Availability
Black / 2XS 939740 818759 Only 1 Left: Ships within 24 hours
Black / XS 939741 818760 Out of Stock
Black / SM 939742 818761 Out of Stock
Black / MD 939743 818762 Out of Stock
Black / LG 939744 818763 Out of Stock
Black / XL 939745 818764 Out of Stock
Black / 2XL 939746 818765 Out of Stock
Black / 3XL 939747 818766 Out of Stock
Red / 2XS 939761 818789 Out of Stock
Red / XS 939762 818790 Out of Stock
Red / SM 939763 818791 Out of Stock
Red / MD 939764 818792 Out of Stock
Red / LG 939765 818793 Only 1 Left: Ships within 24 hours
Red / XL 939766 818794 Out of Stock
Red / 2XL 939767 818795 Out of Stock
Red / 3XL 939768 818796 Out of Stock


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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 4.6 5 149 149
Awesome Helmet! This is the first "Premium" helmet I've owned. The fit is perfect for my head shape, it's comfortable, durable, and truly a premium product. The vents and face shield mechanisms are rugged and well built, very unlikely to break under heavy / frequent use. I really like ARAI's system for removing the face shield as well, it can take a little practice, but RevZilla has a video for that. :) I highly recommend buying a tinted face shield, really gives the helmet an aggressive look. Only thing I don't like is the noise, it's louder than other helmets I've owned. Pros: Fit, Comfort, Durability, Quality, Style Cons: Loud, very loud. I'll only buy ARAI from now on, and I'd recommend this product to anyone. June 14, 2016
Fanatic helmet This is,the best fitting helmet I have owned. Top quality. April 26, 2016
Love this helmet Having owned 4 other Arais over the years, this is another winner. Extraordinary fit for my intermediate oval head. 1 year and almost 9K miles, this is my new favorite helmet. Flows air like nobody's business. Great chin vent in particular. Visor secures 100% waterproof, no leaks in several heavy rain rides. Pinlock being included was a nice perk and helps keep fogging to a minimum. Awesome 5 star helmet. Wish Arai offered a photochromatic visor. May 26, 2016
Great Helmet! Great service! This Helmet is Great! But the best part of this buying experience has been Revzilla. The helmet is an Arai and is a huge up grade for me both in fit and function over the Bell I had. The venting is incredible moving so much more air than I ever expected. The pro shade system works great too but I've already ordered a longer visor. The stock one seems too short. As for Revzilla, I ordered the wrong size helmet (my head is on the line between MD/LG) and had to return the MD. The speed and ease in which they handled my return was amazing. I reordered the right size and was off and riding in a few days! May 16, 2016
1 week use of the Arai Asteroid (Green version) Summer time desperation buy due to emergency need for a new helmet. As far as looks, mostly positive feedback from other riders and the general public. No negatives expressed so far. The green is more of a neon, so it doesn't really match Kawasaki green 100% up close anyway. Positives: 1. Reduced fog compared to non-pinlock helmets (not 100% but 95% I'd estimate and any fog buildup eventually disappears) 2. Good peripheral view (better than it's competitors in the same price range - sale price) 3. Very comfortable fit - for a medium, intermediate oval which I wear in other similarly priced brands. Negatives: 1. LOUD - it's definitely louder than other brands, including my older RF-1000 (Jay Leno probably loves this kind of road noise but I prefer hearing music) 2. The visor lock is a pain, trying to unlatch it with summer weight gloves is a near impossible task 3. I ride vintage bikes & sport bikes. This helmet is not great in the full tuck position, so Revzilla's Youtube review is spot on - full upright to 3/4 tuck is what it can do. I've bought 3 Revzilla reviewed products this year and Revzilla has been 95% spot on in their reviews so far. May 10, 2016
It's hard buying helmets online. I got this helmet because of aria helmets good reputation. Unfortunately the helmet does not fit me as well as I expected. I purchase this helmet under the sizing guidelines and while standing still in my house it fits me perfectly, but when I'm out on my bike I get a severe tension headache. By the time I was aware of this issue it was too late to return the helmet. Now I have a $600 helmet that I've worn three times, sitting in the box and I'm not allowed to refund it due to RevZilla's return policy. I was advised to sell locally by the geek I spoke with. May 4, 2016
Great Helmet- but Pro Cruise not so much I have now put over 1000 miles on this helmet and must say the Arai Defiant (I'll talk about the Pro Cruise system below) is amazingly comfortable and extremely well built. It has great airflow which helps with 80+ degree weather in the summer, but doesn't suffer from excessive fogging or air leakage when you close the vents during sub-40 degree riding in the winter. I have two minor gripes with the helmet itself- 1) the integrated chin curtain is a bit small and doesn't block as much air as I'd like. 2) the visor locking mechanism is extremely difficult to use, especially with gloves on. As for the Pro Cruise system- I don't think it is a worthwhile accessory. When it's down it doesn't quite come down far enough- especially on the sides- to truly block all the light you'd like it to. And when it's up, boy is it annoying! It doesn't upset the helmet terribly, but it does act as a bit of a sail on top of the helmet, and it DEFINITELY makes the helmet LOUDER up or down. I could see it working fine for someone who's entire commute take place at <30 mph. I've ended up replacing the Pro Cruise system and the included clear face shield with a mirrored one from Arai which is amazing- really blocks the light and actually helps the helmet stay cooler. April 28, 2016
Beautiful helmet, does everything I want in a helmet Great airflow, fits my head perfectly. Just loud but I'm totally fine with that for all the airflow. April 26, 2016
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