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Purchase Item: Gmax AT-21 Adventure Helmet Matte Black
  • SKU: HEGX4501
    Gmax AT-21 Adventure Helmet Matte Black

  • $159.95

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GMAX AT-21 Matte Black

GMAX® is excited to introduce the ALL NEW AT-21 designed competitively from the ground up.
The AT-21 is constructed from a lightweight Polycarbonate shell offering superior protection and exceeds DOT and ECE safety certifications.
This helmet is made in 3 shell sizes, from youth to adult, offering a lightweight shell for any adventure.
Internally, the helmet is equipped with an inner sun shield, SpaSoft™ interior and recessed speaker pockets for communication systems. The removable interior with COOLMAX® CORE Technology wicks moisture away from the body and is designed to keep you dry and comfortable during your journey. Enjoy your adventure with the all new AT-21 from GMAX®

  • ECE / DOT Approved
  • Quick release buckle
  • Constructed from a lightweight Polycarbonate shell offering superior protection
  • Removable, adjustable, and washable antimicrobial SpaSoft™ interior allows for easy cleaning and custom fitting
  • Lightweight shell
  • Drop down sun shade with anti-fog coating
  • Built in speaker pockets for communication systems

Sizing instructions:
To find your approximate size measure the circumference of your head one-inch above eyebrows and across the largest portion of the back of your head. Cross reference this measurement on the helmet size chart to determine the approximate size.

Sizing guideline (head circumference inched measured above the eyebrow)
XS: 20 7/8 to 21 1/4
Small: 21 5/8 to 22
Medium: 22 7/16 to 22 3/4
Large: 23 1/8 to 23 5/8
XL: 24 to 24 3/8
2XL: 24 3/4 to 25 3/16
3XL: 25 9/16 to 26

Fitment of your helmet can easily be fine-tuned by replacing the snap-in liner and/or cheek pads with a larger (less padding) or smaller (more padding) version. Give us a call or email us direct at for more information.

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