Bell Moto-9 Flex Hound Helmet

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Bell Moto-9 Flex Hound Helmet.

Introducing the Moto-9 Flex. Bell is committed to providing purpose-built solutions that provide across-the-board head protection for the modern rider. So when it came to evolving the race proven Moto-9, we wanted to re-think fit and build on the helmet’s longstanding ability to manage energy. We’re pleased to report, we did. Leveraging the segmented liner from our Segment bike helmet, we sought to achieve a more personalized, adaptive fit, for a wide variety of head shapes. In creating a first-of-its-kind 3 layer impact liner, we utilized a revolutionary combination of polymer materials to provide a “progressive” energy management system that’s designed to absorb low, mid and high energy impacts. When it came to testing, our initial Flex samples outperformed any other motocross helmet we’ve tested to date. The result is no accident, the Moto-9 Flex is the most advanced helmet we’ve ever made and is quickly setting a new levelforrider protection in motocross and off-road racing.


  • Lightweight Carbon Composite shell construction
  • Flex Energy Management interior liner
  • Velocity Flow Ventilation™ system for maximum cooling
  • Exclusive Magnefusion™ Emergency Removal System
  • (MERS)cheekpads
  • Fully adjustable Flying Bridge Visor™ with air intake vents
  • Integrated vented roost guard
  • Exclusive Magnefusion™ magnetic strap keeper
  • Padded chin strap with D-ring closure
  • Eject® System ready
  • Padded, lined helmet bag included
  • Industry-leading Five-year warranty
  • Snell M2015 and DOT Certified

Helmet Size Information. We ask that you use the following information to help choose the proper size helmet. In order for a helmet to protect properly and be the most comfortable, it must besizeto your head correctly.

To find the Correct size helmet for a person's head:

  1. Measure the head circumference one-inch above the eyebrows and ears
  2. Using the circumference measured, use the size chart below to find the approximate size
  3. Once you have tried on the helmet it should fell snug equally around the head. The helmet should not feel too tight or too loose at any point around head.

Shell EPS  Size Circumference (CM) Circumference (IN) Hat Size (IN)
1 1 XS 54-55 CM 21 1/4"-21 5/8" 6 3/4"-6 7/8"
S 55-56 CM 21 5/8"-22" 6 7/8-7"
2 2 M 57-58 CM 22 1/2"-22 3/4" 7 1/8"-7 1/4"
L 58-59 CM 22 3/4"-23 1/4" 7 1/4"-7 3/8"
3 3 XL 60-61 CM 23 5/8"-24" 7 1/2"-7 5/8"
XXL 62-63 CM 24 1/2"-24 3/4" 7 3/4"-7 7/8"


Bell Moto-9 Helmet Cheek Pad Matrix


Cheek Pad Matrix
Shell Size OEM Cheek Pad Size Compatibility
S 40 mm
M 40 mm
L 35 mm
XL 35 mm
2XL 30 mm