Giro Athlon Helmet

Priced: $67.48 - $134.99 Rated:   - 4 stars out of 5 by 7 reviews.
Giro Athlon Helmet
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Color: Red / Black
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Giro Athlon Helmet -

The Giro Athlon was created in response to their efforts to better the hugely popular E2 Helmet. In Giro's world this is true -- make it better or don't waste the effort. Well, they didn't waste their time. The Athlon betters its predecessor by moving air more efficiently over the rider's head, and its shape has been improved by Giro's attention to "form language."

You shouldn't be surprised. Giro would never release a new helmet that didn't outperform the one that came before it. Even though the vents in the Athlon appear smaller than what you remember on the E2, Giro has improved their internal channeling to move that air over your head faster and easier. There are a total of 23 wind-tunnel-tuned vents for both intake and exhaust.

The Athlon's shape is more in tune with a human head than the E2. This is actually something we'd struggled with when checking out the E2. We liked the vents, the Roc Loc, etc, but the helmet didn't work with our aesthetic sense. It turns out that Giro felt this way too. So the shape is more organic but still has an aggressive quality about it. The Athlon also sits a bit lower on the head which helps it seem to disappear when riding.

The Athlon uses Giro's latest retention system, Roc Loc 5. The advantage over the older Roc Loc 4 is that you can make micro adjustments to the retention basket with a thumb and finger -- simply twist the ratcheting dial to achieve perfection. The whole system can be adjusted up and down to cradle the back of your head just as you like. Some of Giro's forward thinking gave rise to the special shape of the arms -- they allow the use of Giro's eyewear without interference, and they maintain the position of your straps so getting the helmet on is a no-muss, no-fuss affair.

The Giro Athlon Helmet is available in Black/charcoal and Matte White and in three sizes -- small, medium, and large. The visor has 15° of vertical adjustability for optimal protection/visibility, and it's removable as well. The wicking pads are durable, thanks to the welding of the cover material to the pad material, and easy to wash if they get stinky.


  • Roc Loc 5 fit system offers one-handed adjustment of fit tension and vertical position with a ratcheting, micro-adjustable dial


  • In-mold construction with Roll Cage reinforcement features a polycarbonate outer shell and a web of DuPont nylon molded inside the EPS foam liner


  • 23 vents with Wind Tunnel air channel technology keep your dome from overheating
  • Wind Tunnel ventilation system combines active vents with internal exhaust channels that thrust cool air over the head and force hot air out


  • Made in China


  • US shipments only
  • All-new RocLoc 5 allows for quick and easy on-head adjustment
  • Updated low-profile P.O.V. adjustable visor w/ 15° vertical adjustment
  • Internal Roll Cage provides extra strength upon impact
  • Point of View visor allows for 15 degrees of on-the-fly vertical adjustment
Jenson USA (2013)
The Giro Athlon is used by XC racers Adam Craig and the Rabobank/Giant MTB Team and by riders that are looking for a strong lightweight helmet that is comfortable in all conditions. Giro’s Wind Tunnel™ ventilation system is a combination of active vents with exaust channels in the helmet that push cool fresh air onto the riders head and pushing out the warm air that is already inside the helmet. Keeping the head cooler and more comfortable is just the start. For safety, Giro uses an In-Mold reinforced roll cage along with the In-Mold-EPS liner with polycarbonate shell. In the event of a crash, this technology allows the Giro Athlon to maintain structural integrity and offer maximum protection.

Giro uses Roc Loc 5, their best fit system, to fine tune the fit of the helmet with micro adjuster as well as the ability to offer fore/aft tilt adjustment. The interior padding is plush and uses X-Static fabric to combat bacteria and odor.

Giro Technology

Sierra Trading Post
Giro's Athlon bike helmet is engineered for optimal protection and cool comfort during grueling climbs and high-speed descents. Wind Tunnel vents deliver serious cooling power, and the removable visor keeps the sun and branches out of your eyes.

Al's Sports
The Athlon was developed with a single purpose in mind-XC racing. This helmet combines 23 generous Wind Tunnel vents plus smooth style, a compact shape, minimal weight, and an updated, low profile P.O.V. visor. You’re not going to find a better performing, more comfortable, competition-specific MTB helmet. The Athlon will keep you on top, whether it’s a world cup XC, a 24-hour race, a local short track or a high speed Super D. At the very least, you’ll look good trying. Top 25 Category Product
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Review RatingNumber of Reviews
Construction:In-mold - EPS liner, polycarbonate shell
Features:Updated low-profile P.O.V.™ adjustable visor w/ 15° vertical adjustment
Fit System:Roc Loc® 5
L:22.75" or greater
M:22 to 22.5"
S:21.75" or smaller
Suggested Use:MTB XC Race, MTB Endurance/Marathon, MTB Trail Ride
Uses:MTB XC Race, MTB Endurance/Marathon, Trail
Ventilation:23 Wind Tunnel™ vents, internal channeling

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Giro Athlon Helmet Reviews:


I have a few Giro MTB helmet and this is the first one with Roc Loc 5 and the are so easy to turn and adjust. I like the Matt Black color and the simple design. It looks nice with and without the visor. The 300g weight is ok for Mountain Biking and you hardly feel the weight. The strap is thin and soft unlike some low end Giro helmet. Since I was my helmet after long ride, cleaning the padding is a little inconvenience. It has 5 pieces and I lost 2 small one. I would recommend them when on sale since it is pricey for full price.

Samsudin at on 10/14/2013

This Helmet is great. I have been using it for a few months now and am very happy with it. It is light and fits great. I had an older Athlon with the RocLoc 4 system and was happy enough with it but the RocLoc 5 system on the new Athlon is definitely more sturdy and better designed. The venting is good and I like the fact that the visor is removable for when I jump on my road bike. All in all it is a great helmet for the price.

Charly at on 12/03/2010

Nice looking helmet in the matte finish. Sizing chart is correct. Helment comes packaged with 2 plugs to fill holes if peak is removed and larger pads for smaller head cirumferences. No replacement pads included as with the 2 previous Giro helments I've purchased but this isn't a deal breaker. Great price from Real Cyclist.

mar5106353 at on 12/08/2011

My wife loves this helmet. If only it came in a few more colors that were women-specific, it would be perfect, but the fit is nearly as good as much more expensive offerings from Giro and she likes that the visor is there for dirt rides and removable when she's on the road.

Mark Parrett at on 05/17/2012

This is a good value helmet for racing. I used it for my first Iron Man. The fit adjustment dials in the fit well so the helmet stay put while riding hard.

Brett Stahl at on 06/17/2013

Great fit and light. Good venting. Giro comes through with a great helmet.
Robin, Whistler BC

robp635552 at on 08/31/2013

I tried this and the Pneumo. Very similar in lightness, but has more vents.

Diego Zegarra at on 12/16/2013