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Altitude 2.0 Carbon Fiber R-Series Helmet

Reinvented to ride even harder, the second generation of the bestselling 509 Altitude series unleashes a whole new animal. At the top of the podium is the 509 Altitude 2.0 Carbon Fiber R-Series Helmet featuring a lighter and stronger hand lay-up carbon composite construction. Race-legal across all forms of ISR racing events, it leads with the highest levels of safety and performance. Race-ready orange and DOT/ECE dual certified, it includes the secure fit of a dual D-ring chin strap.

Features:

  • Hand lay-up carbon fiber composite construction
  • XS to 4X sizes available in three shells for optimal fit and minimal weight
  • Upper vents with on/off shutter closure for airflow control
  • Go-Pro mounting capability, improved design
  • Perfect fit between helmet eyeport and 509 goggles
  • Pro-Series Breathbox for complete protection, removable for optimal air flow
  • Race ready Orange to comply with ISR regulations
  • DOT/ECE dual certified helmet to comply with ISR regulations
  • Dual Ring chin strap closure for secure and racing tight
  • 509 helmet bag included
Product Style RevZilla Item # Store Sku MFR. Product # Availability
Product Style Orange / XS RevZilla Item #1833729 Store Sku MFR. Product #F01009800-110-401 AvailabilityAvailable: Ships in 3-5 business days
Product Style Orange / SM RevZilla Item #1833730 Store Sku MFR. Product #F01009800-120-401 AvailabilityAvailable: Ships in 3-5 business days
Product Style Orange / MD RevZilla Item #1833731 Store Sku MFR. Product #F01009800-130-401 AvailabilityAvailable: Ships in 3-5 business days
Product Style Orange / LG RevZilla Item #1833732 Store Sku MFR. Product #F01009800-140-401 AvailabilityIn Stock: Ships within 24 hours
Product Style Orange / XL RevZilla Item #1833733 Store Sku MFR. Product #F01009800-150-401 AvailabilityAvailable: Ships in 3-5 business days
Product Style Orange / 2XL RevZilla Item #1833734 Store Sku MFR. Product #F01009800-160-401 AvailabilityAvailable: Ships in 3-5 business days

509 Helmet Sizing

Size Head (cm)
XS 53-54
SM 55-56
MD 57-58
LG 59-60
XL 61-62
2XL 63-64
3XL 64-65
4XL 66-67

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.


How to Measure

  • H Head
    Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
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