Giro Atmos
  • Color: Matte Black/White
  • Color: Matte White/Silver
  • Color: Matte Titanium
  • Color: Matte Titanium
  • Color: Matte Titanium
  • Color: Red/Black
  • Color: Matte Black/Highlight Yellow
  • Color: Blue/Black
  • Color: Bright Green
  • Color: Matte Black/ Blue MC Hesher
Please select options


Giro's Atmos is a favorite helmet among many roadies, XC riders and cyclocross racers everywhere. It's crafted with Giro's In-Mold and Roll Cage technologies for excellent durability and low weight, plus it boasts a whopping 26 vents and Giro's Wind Tunnel venting to pull cool air in and blow hot air out, a vital feature when you're laying it all out on the race course. Maybe best of all, it utilizes Giro's Roc Loc 5 retention system for a perfect fit.

- Small = 51-55cm
- Medium = 55-59cm
- Large = 59-63cm

Giro's Roc Loc 5.

A) Micro Dial - A ratcheting dial that’s simply twisted to tighten and loosen the fit.

B) Three-Position Vertical Fit - Lets you raise and lower the Roc Loc system to the perfect position.

C) Ergonomic Arms - Minimal shape fits comfortably and accommodates eyewear.

D) Dual Pods – Supportive, minimal panels that cradle your head for the utmost in comfort and safety.

E) Strap Management - The straps (not shown) are woven through the fit system to always remain in the right place.


The Atmos' carbon-reinforced ribs and internal Roll Cage offer exceptional safety, lightness and ventilation.


Atmos overview

In-Mold construction process

Wind Tunnel ventilation system

Part Numbers

Option UPC MPN Store SKU
Matte Black/White / Small 768686893285 2038983
Matte Black/White / Medium 768686893292 2038984
Matte Black/White / Large 768686893308 2038985
Matte White/Silver / Small 768686893315 2038986
Matte White/Silver / Medium 768686893322 2038987
Matte White/Silver / Large 768686893339 2038988 1186
Matte Titanium / Small 768686893346 2038989
Matte Titanium / Medium 768686893353 2038990
Matte Titanium / Large 768686893360 2038991
Red/Black / Small 768686893377 2038992
Red/Black / Medium 768686893384 2038993


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of respondents would recommend this to a friend.


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Excellent fit on a lightweight helmet


from San Anselmo, CA

About Me


Started racing in the early 70's, have been cycling for 40+ years, often in hot conditions. This helmet is lightweight, cool and best of all, it covers my head a bit more than comparably priced helmets. Probably the best fitting helmet I've ever tried on, which is a big deal as I owned a bike shop for 13 years, and then was on the road with a bike company for 3 years afterwards. Expensive, but I would buy another one if I had to.

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