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Giro Air Attack Helmet

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Item # GIR0400 Past Season Colors

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Item # GIR0400

Drag doesn't stand a chance.

The Garmin-Barracuda riders are using them, as well as many other of the peloton's racers. And while it might still be too early to say that we're used to seeing them, the trend among the number of pros who've made the switch is rising. We're talking about those 'odd-looking' round helmets that look like they belong atop BMX riders' domes more than those of road cyclists. But, like any new products adopted by pros that seem out of place at first, there's usually some solid reasoning behind their implementation. As for the new Giro Air Attack helmet, it comes down to a single word: aerodynamics.

Traditionally, aerodynamic cycling helmets have relied on sloping shapes, minimal venting, and a teardrop tail design to dictate the flow of air in order to overcome aerodynamic drag. However, with Giro's new Air Attack, its engineers had to rethink the shape of this typical design. The reason for this was simple -- the objective of the Air Attack was to mate an aerodynamic helmet with a design that was compact, well-ventilated, and able to be worn for long periods of time.

To start, the helmet was designed with a similar frontal area as Giro's Selector time trial helmet, only with a new 'chopped-off' rear section. Wind tunnel testing proved that the air still 'thinks' it's moving around a long tail, when, in fact, the excess material no longer exists. In addition to now having roughly the same minimal drag (only 11% more) than the Selector, the Air Attack provides a drastic increase in weight savings. In fact, the claimed weight of the Air Attack is 264g versus the Selector's 430g.

The second major consideration when designing the Air Attack came down to thermodynamics. After all, Giro's engineers knew that a lightweight, aerodynamic helmet was worthless to the peloton if didn't ventilate well. This led Giro to the development of what it calls 'the Therminator,' which is a head-form heated to the temperature of a human, with 'thermo-couples' added on the outside. The information relayed from this system allowed engineers to map out parts of the head that stayed both cool and warm in the wind tunnel, which let Giro locate where vents were working and where they were not. What Giro found was that as air hits the rider, there is a very high pressure zone right at the forehead. In response, the Air Attack's new fit system, known as Super Fit, suspends the rider's head off of the EPS, allowing air entered in that front three millimeter portion of the helmet to flow over the top of the head and out the large, strategically placed back channels. Remember that 11% additional drag over the Selector? The 28% increased cooling power achieved ought to make up for it.

The Attack isn't as light as Giro's fully-vented and top-end Aeon helmet, but it still provides you with 97% of its cooling efficiency and an 11% boost in aerodynamic efficiency. We'll let you weigh the trade-off.

The Giro Air Attack Helmet is available in the sizes Small, Medium, and Large and in the colors Black/silver, Black/red, Blue/black, Matte Black, Matte Titanium, and White/silver.


Tech Specs

[shell] in-mold polycarbonate, [impact protection] EPS (foam)
Adjustable Vents:
no, 6 vents
Fit Adjustment:
Roc Loc Air
Claimed Weight:
264 g
Recommended Use:
road cycling
Manufacturer Warranty:
1 year

Size chart


Adult Cycling Helmets
 SS/MMM/LLXLAdult UniversalWomen's Universal
Head Circumference 20 - 21.75in
(51 - 55cm)
20 - 22.5in
(51 - 57cm)
21.75 - 23.25in
(55 - 59cm)
21.75 - 24in
(55 - 61cm)
23.25 - 24.75in
(59 - 63cm)
24 - 25.55in
(61 - 65cm)
21.25 - 24in
(54 - 61cm)
19.75 - 22.5in
(50 - 57cm)
Head Circumference 20 - 20.75in
(51 - 53cm)
21.25 - 22in
(54 - 56cm)
22.5 - 23.25in
(57 - 59cm)
23.5 - 24.25in
(60 - 62cm)
How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

Reviews & Community

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Giro Air Attack Helmet

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Here's what others have to say...

Avg. ride time: 10h 7m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.
4 5


  • Gender: Male
  • Familiarity: I've used it several times

Definitely a fast helmet, great for fast flat races. The few times I've ridden with it in the heat it has been fine, with the exception of slowing down for climbs, ugh. This is the Achilles heel of this helmet otherwise it would be a great all around. if you spend allot of time going uphill in the heat swap for another lid. I picked up a better vented helmet for training and hilly races and will save this for cooler rides and flatter races.

The fit is great, feels very secure and is easily adjustable.

Avg. ride time: 6h 2m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.
4 5

Aero Without the Heat

  • Familiarity: I've used it several times

I have loved this helmet. I have a size L head and have trouble finding helmets that feel "right," but this helmet does so much more than just feel great.

I can't comment on the additional watts from the 10% more aero this lid is supposed to make your head, but I have noticed that when I get down and lower the head, the sound is totally different and I do feel like things feel fast. This also has the dual effect of letting the AC flow across your scalp. Riding upright and at a relaxed pace the air vents are just big enough to provide a cooling breeze, but it cools you off when you need it the most.

Other nice things I've noticed in the last ~500 mi with it is that it is incredibly light and comfortable. I was kind of impressed with how light this thing is. I haven't weight it, but it feels lighter in the hand and on the head than my Bell Sweep.

Love the helmet and likely will buy again should something happen to this one.

5 5

Great Helmet

  • Familiarity: I've used it several times

I use the helmet for everyday riding. The helmet is very comfortable, not too heavy and considering the lack of vents, it vents really well. I've been riding in high 80's so far and seems to vent just as well as my other helmet.

Unanswered Question

Is it only the size S (small) available?

can this be used with the shield glasses or must you buy the Air Attack Shield helmet

Responded on

If you would want to use a shield you would need the shield version that has the attachment points you could ride it with or without the shield attached.

5 5

Great Helmet!

Saw this on sale and thought I'd give it a try. Took it out for the first time today and was very impressed. The retention system is a little different from helmets I've used in the past. The Air Attack actually cradles your head (kind of like a hard hat) and creates a channel for air circulation; it's pretty ingenious. The padding inside is very plush as well. I think it's awesome.

4 5

Lightweight & great for cool rides

I have used this helmet 10 times now. All the use has come below 60 degrees. I have an Aeon that I use in the summer and prefer this helmet at cooler temps. I will likely go back to the Aeon in the summer for the increased ventilation, but I certainly like it as a second helmet. Additionally, I find the Aeon to be more aesthetically pleasing.

5 5

Excellent helmet

  • Familiarity: I've used it once or twice and have initial impressions

Just didn't fit my odd shaped head

5 5


  • Familiarity: I've used it several times


5 5

Good Helmet

  • Familiarity: I've put it through the wringer

This is really good helmet. On sale for $79 was a steal.

Previously, I had a Giro Savant and that thing always reminded me that it was on my head. The Air Attack is a different story. The helmet is light to begin with but with the retention system it sometimes feels as if you're not wearing a helmet at all - it's a great feeling. Venting is fine, I'm not sure how well it'll do in the summer. Note, as far as I can tell there's no way to "dock" sunglasses onto the helmet.

Avg. ride time: 5h 46m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.
5 5

Enjoy this helmet

  • Familiarity: I've put it through the wringer

I have had a love/hate relationship with helmets over the years. I have never found one that I forget about when I wear it until this one. It is comfortable and quiet. It stays put and i don't have to adjust it mid-ride. I forget I am wearing it and just ride. I love it!

5 5

Test Results Sharing...

  • Familiarity: I've put it through the wringer

I have a knack for testing a helmet across the few decades I've been riding. The last couple years, no exception.... I am an avid USAC Cat 3 rider, and benefit from a strong local culture and it is fast fun.
Unfortunately, last September... I had opportunity to test the Giro Attack helmet. I bought this helmet not on looks... albeit a friend has the Air Attack version and looks a bit like "large helmet" from spaceballs (as his is vertically challenged) but the helmet looked smart... similar in style to a Vetta Polycarbonate Salad bowl I would only race with due to weight and heat back in the '80's. Eitherway, style is not why we buy helmet, but helps. This helmet does grow on consumer...
Immediate marks go to the helmet is quieter, light and aero. Con's are minimal, but as it is a solid helmet, you will want to remove it when you stop, to prevent condensation from rolling off the inside of your lid (although it does add sweaty electrolytes to any snack)
While clipping along at 30mph, the true test was initiated. As a few of our late season strongmen, were over performing, when they decided to create an unorthodox exchange while on the point. My partner locked his brakes and swerved. While the details are a bit sketchy the test was initiated. I might add, the helmet allowed me to hit the deck at full speed and collide the right side of my tempural (tempura?) lobe to the pave' which passed. In addition, while sliding, my occipital lobe was allowed to drag across the chip and seal. The wear of the helmet outer shell appears to be good for about a 100ft drag before it wears through. Finally, as I was at the front of a large group, a terribly nice guy struck my helmet with the skewer of his front wheel. This impact was later validated with a tweet, as he attempted to apologize for using me as a barcon on a pedestrian walkway. I was not without injury during this test, and rose from the deck slightly concussed... however, I feel this helmet passed. A++

Avg. ride time: 6h 1m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.
5 5

Forget Aerodynamics

  • Familiarity: I've put it through the wringer

Sure, maybe this helmet makes a difference with its aerodynamic shaping.

What it does do well - winter riding - a little electrical tape over the vents keeps your head dry and warm in the worst conditions. Never leave home on a winter ride without this guy. Best helmet for bad conditions!

Responded on

I FAT bike in the winter, and warmth is something I hadn't even considered. Thanks for the idea!

4 5

Good helmet, great for bugs

  • Familiarity: I've used it several times

Got this helmet to be a bit more aero, and also to ride with when it cools down a bit. Doesn't vent quite as well as Swiss cheese helmets, but that's a reality, rather than a plus/minus. That said, I don't miss catching the random bug with the middle of my head at 20-something MPS; every once in a while, hear one clunk off the front plate and smile a little.

More seriously, the retention mechanism is really well designed, particularly if you have a pointy head. If you have an issue with a helmets making contact on a small area atop your head, this could sort that out.

3 5

Good helmet but expensive

  • Familiarity: I've used it several times

I bought this helmet because some reviews note that it is quieter than traditional vented helmets. This is true but the difference is not great. Cooling has been fine in fall riding but I have not used it in hot weather. Like most expensive helmets I find it hard to see much benefit over a $35 lid.

4 5

My cold-weather riding helmet

  • Familiarity: I've put it through the wringer

The fit is great. It has fewer vents, and while they claim it vents really well, it vents way less, which is great for winter riding. It is also a more quiet helmet, I feel. Four stars, only because it is really good, not great. I'm happy with "good" though.

Avg. ride time: 1h 37m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

i have the visor from my previous helmet. does the air attack by itself have the ability to connect to the visor/does it have the three magnetic round points on the front of the helmet like the air attack shield?

Best Answer Responded on

This one doesn't have the magnetic points like the Shield model. Just the Shield model has magnets

Avg. ride time: 1h 16m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

does this come with the visor?

does this come with the visor?

Best Answer Responded on

Hello Frenky,

This helmet does not come with a visor.

Responded on

You are looking for the giro air attack shield. It costs $40 more and is also in competitive cyclist. They list it as a different product.

5 5

surprisingly impressed

This was an impulse purchase. After seeing a few people on the road with it and liking the low profile looks of it, I thought it might be a good winter riding helmet. I tried a friend's on, and was surprised at how comfortable it is on my head. Not sure if it is the suspension system, light weight, or it just fits my roundish head better than my current Specialized or previous Bell helmets. In either case it was comfortable. What I noticed on the road were two things: it vents just fine at moderate speeds, and the helmet is eerily quiet. I always thought that wind noise was mostly just from moving down the road, but after wearing this helmet, it seems like there's a lot of noise that comes off of vented helmets. In any case, I love it. It'll be my winter riding helmet for now, and will switch to my Specialized for climbing days and during summer. If Giro puts this Roc Loc Air suspension on a vented model, I will for sure buy another one. It's surprisingly comfortable.

Avg. ride time: 5h 56m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Giro: Developing the Air Attack -A Shift

By Giro Sport Design