Giro Atmos
  • Color: Matte Titanium
  • Color: Black/Rhone Flowers
  • Color: Blue/White
  • Color: White/Silver
  • Color: Black/Titanium
  • Color: Red/Silver
  • Color: Matte Black/White Crowd
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Giro's Atmos is the favorite helmet for many roadies, XC riders and cyclocross racers everywhere. It's crafted with Giro's In-Mold and Roll Cage technologies for excellent durability and lightness, 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 function for racing's extreme efforts. Maybe best of all, it boasts 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.


Wind Tunnel technology

Watch a video of Levi Leipheimer talking about Giro’s Roc Loc 5 fit system.

Part Numbers

Option UPC MPN
Matte Titanium / Small 361857313911 2023004
Matte Titanium / Medium 361857313928 2023005
Matte Titanium / Large 361857313935 2023006
Black/Rhone Flowers / Small 361857348951 2030500
Black/Rhone Flowers / Medium 361857348968 2030501
Black/Rhone Flowers / Large 361857348975 2030502
Blue/White / Small 361857313942 2023007
Blue/White / Medium 361857313959 2023008
Blue/White / Large 361857313966 2023009
White/Silver / Small 361857313973 2023010


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by PowerReviews

(based on 1 reviews)


of respondents would recommend this to a friend.


  • Convenient back-of-head adjustment 
  • Durable 
  • Good ventilation 
  • Lightweight 
  • Nice fit system/pads 

Best Uses

  • Everyday riding 
  • Mountain biking 
  • Road cycling 
  • Warm weather 


Reviewed by 1 customers

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Excellent fit on a lightweight helmet


from San Anselmo, CA

About Me Competitive Cyclist


  • Lightweight
  • Good ventilation
  • Convenient back-of-head adjustment
  • Durable
  • Nice fit system/pads


    Best Uses

    • Mountain biking
    • Road cycling
    • Everyday riding
    • Warm Weather


    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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