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Troxel Sierra Helmet
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Troxel Sierra Helmet view #1
Troxel Sierra Helmet view #2
Troxel Sierra Helmet view #3
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Troxel Sierra Helmet

Item # 36038
  • Redesigned with an entirely new low profile look and geometric visor
  • Rugged Cordura and leather covering withstands the toughest terrain
  • Lightweight and highly ventilated for unparalleled comfort and stability
  • Flip-Fold-Fit System accommodates the various head shapes
  • Self-adjusting Cinch-Fit Pro adjusts to the size and shape of rider’s head
  • ASTM/SEI certified
  • Colors: brown, black, tan
  • Sizes: small (up to 7), medium (7 - 7 1/4), large (7 1/4 - 7 3/8), x-large (7 3/8 - 7 3/4)
full description
Item Options / Availability Quantity Price
#36038
SIZE CHART

Troxel Helmet Size Conversion Chart

Hat Size

Head Size (inches)

6 5/8

20 3/4

6 3/4

21 1/8

6 7/8

21 1/2

7

21 7/8

7 1/8

22 1/4

7 1/4

22 5/8

7 3/8

23

7 1/2

23 1/2

7 5/8

23 7/8

7 3/4

24 1/4

$119.99 $99.99

Newly redesigned! Engineered for riding extremes, the Sierra’s rugged covering not only looks good, but also withstands the toughest terrain on the trail. Its excellent ventilation and mesh covered vents have made this the trail rider’s number one choice. 


  • New Self-locking buckle! 
  • New low profile
  • New riveted CORDORA® and Leather Finish
  • New Visor
  • Mesh Covered Vents
  • CinchFit Pro™

The Sierra helmet has been completely redesigned with an entirely new low profile, but will be instantly familiar to the hundreds of thousands of Sierra helmet owners around the world. Engineered for riding extremes, the Sierra’s new riveted Cordura® and leather covering not only looks good, but also withstands the toughest terrain on the trail.


The helmet is lightweight, highly ventilated, and very comfortable. The self-adjusting CinchFit™ Pro adjusts to the size and shape of the riders head for an unmatched level of comfort and stability. The Sierra’s new sleek profile and its proven technology and materials make it the finest all-terrain helmet available. 

Troxel Helmet Size Conversion Chart

Hat Size

Head Size (inches)

6 5/8

20 3/4

6 3/4

21 1/8

6 7/8

21 1/2

7

21 7/8

7 1/8

22 1/4

7 1/4

22 5/8

7 3/8

23

7 1/2

23 1/2

7 5/8

23 7/8

7 3/4

24 1/4

To properly size your helmet, measure the circumference of your head by placing the measuring tape roughly one inch above the eyebrow. Different helmet manufacturers have different sizing, so consult the size chart for the particular helmet that you are purchasing. Also consider how you will wear your hair in your helmet. If you are planning on wearing your hair up inside the helmet, allow room for this when choosing a size. When you receive the helmet, place it on your head without fastening the harness. If applicable, adjust the dial on the back of the helmet. Make sure the brim is resting no more than one inch above your eyebrows. Gently try to move the brim up and down. If your eyebrows move, your helmet fits correctly from front to back. Next, shake your head side to side, to the left and to the right. The helmet should remain in place. If either of these tests result in movement, you will want to drop down a size. If the helmet seems to be "perched" on top of your head, you will want to consider moving up a size.

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