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Arai Defiant Base Helmet
  • Frost Black/White
  • Frost Black/White
  • Frost Black/Orange
  • Frost Black/Orange

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Video Reviews (4)

Arai Defiant Base Helmet Videos

Arai Defiant Base Helmet

Designed specifically for the aesthetics and needs of street fighter and naked bike rider in mind, the new Arai Defiant Base 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 Base Helmet 5 5 4 4
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
Great helmet for Las Vegas This I believe is the best helmet I have owned and I've had quite a few. The fit is great although some times the breath shield tickles the tip of my nose but not often enough to be an issue. This is a GREAT summer helmet breathes better than any helmet I have worn very cool during the summer months (120+ here). That said it is now cooling off and even with all the vents shut there is still a breeze inside around my upper lip that I cant get to go away. Living in Vegas this is not an issue as it's only cold here for 2 months. Now let me tell you about why I love this helmet. It cuts right through the wind and it gets windy here. In my old helmet the wind would buffet my head all a round and make it very difficult to look forward (a real pain in the butt around turns) this thing cuts right through. It actually allows me to ride better! My only other issue wit the helmet is with the pinlock system installed (both clear) there is a bit of a starburst effect at night when approaching head/street lights. It's not at all debilitating but it can be a bit distracting. In all fairness my night vision is not the best so it probably bugs me a little bit more. Been riding with the smoke pinlock it's not dark enough (they never are for me) and there has been zero fogging so that feature seems to work well. October 9, 2013
replacement for my Vector 2 Vector 2 used to pinch my ears on long rides, so I went for this new Defender, which I was told is slightly rounder. It worked. I just returned from a 1400 mile jaunt. Love the feel of the helmet, the new features, new ventilation system works well. Maybe a little noisier than the vector 2 and the field of vision for some reason does not seem as good to the sides as the Vector, but they use the same face shield so maybe it's my imagination. Ventilation was great, but days were not too hot so can't say more than that. Also not fair to comment on protection/durability because I have no idea beyond Arai's great reputation. August 28, 2013
Perfect replacement for Long-Oval Profile/Signet Lovers The Arai Defiant is the long awaited replacement for my aged Profile helmet. If you're an "Arai head" i.e. long oval, you _have_ to try this one. As always, I'm thrilled with RevZilla service! I got an e-mail availability notice, ordered & had the helmet 3 days later. It's a _perfect_ fit (BTW, I wear a XXXL). But wait...there's more - a clear Pinlock anti-fog visor was included! Anthony - you & Team Zilla ROCK! PS - written by GM, Janet's S.O. August 15, 2013
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Have a functionality, fit, or otherwise product-specific question about the Arai Defiant Base Helmet? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Arai Defiant Base Helmet
Already Asked: 7 Questions, 29 Answers
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RevZilla Store asked: Why did you choose this?
D W: I ride a triumph Speed Triple bike and determined this was the best Arai helmet for upright sportbike riding. Apr 17, 2014
John F: Designed specifically for non-faired naked bikes. Oct 30, 2013
Janet F: Thank heavens Arai offers XXXL again! Great venting. Pinlock standard - woo hoo! (Glenn) Oct 12, 2013
A shopper asked: I have seen your videos on both the Defiant vs RX-Q. I ride a F800R. Im leaning more towards the Defiant becuase of looks but stacked up against the RX-Q , aside from style, any diferences to point out that can help me clairfy my purchase? My commute is 20 miles but through NYC Apr 24, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
Christopher L: I've done quite a bit of research on both products. It seems the Defiant is far superior in terms of design. It's not just "style." It's the function of that style: the adjustable chin curtain to keep excess wind out (might be especially useful on colder days with your naked); the "diffuser"/spoiler @ the base of the helmet for increased stability and noise/turbulence reduction; HEAVY ventilation (possibly the best Arai has to offer...yes, including the Corsair V) due to the monstrous chin ventilation system (three stage: closed, partial open, full open); and from what I can tell, it looks like the vent controls would be easier to control with gloves on.

Bottom line: I have a 2010 Z1000 (nearly 20,000 miles) and a 2007 CBR 600RR with 56,000 miles on it. ALL these miles have been put on with a Shark RSR2 (thick visor, decent ventilation, awesome looks w/the Duhamel white graphic I got, PERFECT fit and comfort, easy visor swap, etc. etc.) I love the Shark and will be having a real hard time finding its replacement. I'm tedious in my research and after fitting many models (haven't fit on a Defiant) and reading about ALL top-line models it's come down to these (for me): Schuberth SR1 and Arai Defiant. The fit for the Defiant is hopefully identical to the RX-Q (which fit me better than a CorsairV) which is the shell it's based off of. Haven't fit on an SR1 but from what I can read, it's "race" fit is superb. Good luck with your decision. Just remember, when dealing with the top-line model of almost anything, you're not going to make a bad choice, it's just that one will be wiser for you than the others. Just figure out which one.
May 27, 2013
Reply to Christopher Good answer? Yes (0) No (0)

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
Frost Black/White / 2XS 886203 818829 Available: Usually ships in 1-2 business days
Frost Black/White / XS 886204 818830 Available: Usually ships in 1-2 business days
Frost Black/White / SM 886205 818831 In Stock: Ships within 24 hours
Frost Black/White / MD 886206 818832 Available: Usually ships in 1-2 business days
Frost Black/White / LG 886207 818833 In Stock: Ships within 24 hours
Frost Black/White / XL 886208 818834 In Stock: Ships within 24 hours
Frost Black/White / 2XL 886209 818835 Available: Usually ships in 1-2 business days
Frost Black/White / 3XL 886210 818836 Available: Usually ships in 1-2 business days
Frost Black/Orange / 2XS 886195 818819 Available: Usually ships in 1-2 business days
Frost Black/Orange / XS 886196 818820 Available: Usually ships in 1-2 business days
Frost Black/Orange / SM 886197 818821 In Stock: Ships within 24 hours
Frost Black/Orange / MD 886198 818822 In Stock: Ships within 24 hours
Frost Black/Orange / LG 886199 818823 In Stock: Ships within 24 hours
Frost Black/Orange / XL 886200 818824 Available: Usually ships in 1-2 business days
Frost Black/Orange / 2XL 886201 818825 Available: Usually ships in 1-2 business days
Frost Black/Orange / 3XL 886202 818826 Available: Usually ships in 1-2 business days