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Arai Defiant Asteroid Helmet
  • Arai Defiant Asteroid Helmet
  • Arai Defiant Asteroid Helmet
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Video Reviews (4)

Arai Defiant Asteroid Helmet Videos

Arai Defiant Asteroid Helmet

Designed specifically for the aesthetics and needs of street fighter and naked bike rider in mind, the new Arai Defiant Asteroid 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
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Arai Defiant Asteroid Helmet 4.6 5 51 51
Arai Quality As Usual!!! Great Helmet that allows exceptional airflow due to it's many venting options, even with all vents open the noise level is not bad. The Defiant comes with the SAI max vision shield pinlock ready with a clear pinlock lens for an antifog ride. The Black Mate finish will scratch easily if not taken care of. Don't go cheap when it comes to your protection!! Arai makes a great product and this helmet looks great with my Ducati Monster!! April 22, 2014
ARAI got "Harley color" black & orange! Way better than my Harley full face. A lot more air in and out (as says in the video), and much much more lighter than my old one as well. I can tell this helmet has a very good aerodynamic ( even at mid speed, 65~85mph, upright position). Love this helmet!!! Since it comes with pinlock, I personally think you get more for the price, comparing with RX-Q. Yes! It's not a cheap helmet, but you get what you pay for, ARAI !! April 16, 2014
First helmet, high quality. I got the sliver, it is a little bit brighter than the photo indicates, almost like a macbook pro, maybe a little bit lighter colored. Very nice metallic paint. It is a breezy in there though. It feels as if there are some vents open in the back and ears when in fact there are none open. I do ride a naked bike with no windscreen though. After using my friends cheap helmet I noticed that this one is much more stable in the wind, my head just does not shake around like a bobble head at all, even when going fast or in gusty conditions. Also the chin strap is very nice and high quality, does not flap. I used a tape to measure and it is snug but nice. It comes with a clear Pinlock insert, which is nice, but I ordered the smoked one, it is just fine until dusk, it looks very dark, but is just like sunglasses. You will need to wear earplugs with this helmet, and even then it is a bit loud. Rides: 2014 Yamaha FZ-09 April 10, 2014
not worth it! I got this helmet after a lot of looking and reading. one of my primary reasons being wanting a helmet that would be sealed in the winter and not fog, due to sinus sensitivity. the pinlock works, but what doesn't at all is being sealed as the amount of air that flies in through the bottom of the NON-FUNCTIONAL chin vent (decorative at best) is terrible and defeated the purpose all together! the fit in the medium (my usual) too big and the small way snug to the point of discomfort! also now that the fit is better in the overall shell, the front of the helmet is so close to my face and mouth that robs my nose, which concerns me safety wise. not enough room for my sunglasses either comfortable and since there is so little room in it, my glasses fog easily! the face shield action is excellent and smoother than any i have experienced, but it had dinged from highway rocks and screeched easier than my other helmets. same goes for the outer shell. also, the helmet itself is not too loud, but the way it interacts with my naked bikes sport screen is Horribly loud! again worse than my previous helmet. so if i could give it back and get a different shell i would. i cant emphasize how bad the air shoots in through the neck and chin. bad for winter with all the neck raps and ect... bmw Roadster R12r April 9, 2014
It's an arai... I have been riding motorcycles going on 20 years now, from race bikes to nakeds to cruisers to cafe racers and I've always come back to Arai as a helmet of choice. Fit, quality, weight, style, features, can't beat em. I am a physician and unfortunately see first hand the consequences of cheap, poorly fitting, non DOT, SNELL approval and can say that I feel that although riding is risky, I have one if the best head protection products out there. April 7, 2014
Soft and comfy Pros: -the padding is so soft coming from various Icon's. -The padding splits in a way that makes it really easy to wear my glasses. - Not as noisy as previous Icon (airframe & airmada) helmets Cons: - my chin feels like it's touching the inside of the helmet too much. - glasses fog up a bit too much Overall, I dig it. April 7, 2014
Max Airflow Like seemingly every review regarding this helmet, you will get a lot of airflow with this helmet and with that, a bit more noise than you may expect even with ear plugs. You almost don't need to open the chin vent b/c it just draws in air so well. It almost makes the pinlock unnecessary at speed. Headchecks were stable, however I do get a little bit of head-on buffeting on my CBR. A word of warning though, with the flow-through design of chin/moutvent at full open, you will taste whatever bugs you kill. Coming from a Shoei RF1000, the interior of the helmet is amazing. The minute you put on the helmet, it just envelopes you with it's pillowy plushness. It's soft and firm in all the right places. It fits so well, I think I should have gotten a smaller size to take into account the padding breaking in. That padding is a step above and was a huge factor in my choosing this helmet ( I have a soft spot for soft things). Minor gripe is that although the side to side vision is fantastic, the vertical view is cut off a bit if you're in a sportier riding position. Granted the helmet was described as oriented for the naked/streetfighter style so keep that in mind for you sportbike riders. Overall you're getting your money's worth knowing that it's a safe good looking helmet. You can and will wear it for hours on end and feel refreshed. You can almost literally feel the airflow in, out and over the helmet. It's at it's element in a more upright riding style. Don't forget the plugs! April 2, 2014
only helmet you'll ever need This is exactly what I wanted out of a helmet let alone an Arai. Great weight. Great comfort. Great style. And, I have the Arai safety standards to keep me calm. No complaints. March 24, 2014
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Have a functionality, fit, or otherwise product-specific question about the Arai Defiant Asteroid Helmet? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Arai Defiant Asteroid Helmet
Already Asked: 6 Questions, 29 Answers
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RevZilla Store asked: Why did you choose this?
jeremiah r: I like aria helmets Apr 7, 2014
Shakhia G: Excellent reviews. Dec 15, 2013
Marc S: Cool looking and colors match my bike! Sep 4, 2013

Adult Helmets

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 SKU ID Manufacturer Product # Availability
Red / 2XS 886187 818809 Available: Usually ships in 1-2 business days
Red / XS 886188 818810 Available: Usually ships in 1-2 business days
Red / SM 886189 818811 In Stock: Ships within 24 hours
Red / MD 886190 818812 Available: Usually ships in 1-2 business days
Red / LG 886191 818813 Available: Usually ships in 1-2 business days
Red / XL 886192 818814 Available: Usually ships in 1-2 business days
Red / 2XL 886193 818815 Available: Usually ships in 1-2 business days
Red / 3XL 886194 818816 Out of Stock
Green / 2XS 886179 818799 Available: Usually ships in 1-2 business days
Green / XS 886180 818800 Available: Usually ships in 1-2 business days
Green / SM 886181 818801 In Stock: Ships within 24 hours
Green / MD 886182 818802 Available: Usually ships in 1-2 business days
Green / LG 886183 818803 Available: Usually ships in 1-2 business days
Green / XL 886184 818804 Available: Usually ships in 1-2 business days
Green / 2XL 886185 818805 Available: Usually ships in 1-2 business days
Green / 3XL 886186 818806 Available: Usually ships in 1-2 business days