509 Altitude 2.0 Carbon Fiber 3K Hi-Flow Trail Helmet

Item No. 17208-F01009900051
429.95 $429.95

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Product Details

509 Altitude 2.0 Carbon Fiber 3K Hi-Flow Trail Helmet


Reinvented to ride even harder, the second generation of the bestselling 509 Altitude series unleashes a whole new animal. For those who run at redline, the new 509 Altitude 2.0 Carbon Fiber 3K Hi-Flow Helmet maximizes airflow with open upper and rear vents plus a 40% larger chinbar intake. Everything else is what you'd expect from one of the world's bestsellers, including a new hand lay-up carbon composite construction that makes this helmet lighter, stronger, and even more comfortable.


  • Hand lay-up carbon fiber composite construction
  • XS to 4X sizes available in three shells for optimal fit and minimal weight
  • Upper vents for airflow control (shutter closure not available on Storm Chaser and Cyan Navy colors)
  • Go-Pro mounting capability, improved design
  • 509 helmet bag included
  • Pro-Series Breathbox for complete protection, removable for optimal air flow
  • Perfect fit between helmet eyeport and 509 goggles
  • Fidlock chinstrap strap closure for easy in and out


  • Weight - ECE 1050 grams
  • Flow - High
  • Terrain - Mountain
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