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Helmet shape is Intermediate Oval

Shape: Intermediate Oval

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509 Altitude 2.0 Hi-Flow 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 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 fiberglass construction that makes this helmet lighter, stronger, and even more comfortable.

Features:

  • Hand lay-up fiberglass composite construction
  • XS to 4X sizes available in three shells for optimal fit and minimal weight
  • Upper vents for optimal airflow
  • Go-Pro mounting capability, improved design
  • Fidlock chinstrap strap closure for easy in and out
  • Perfect fit between helmet eyeport and 509 goggles
  • Pro-Series Breathbox for complete protection, removable for optimal air flow
Product Style RevZilla Item # Store Sku MFR. Product # Availability
Product Style Black Ops / XS RevZilla Item #1833815 Store Sku MFR. Product #F01009700-110-051 AvailabilityCloseout: This product is no longer available
Product Style Black Ops / SM RevZilla Item #1833816 Store Sku MFR. Product #F01009700-120-051 AvailabilityCloseout: This product is no longer available
Product Style Black Ops / 2XL RevZilla Item #1833820 Store Sku MFR. Product #F01009700-160-051 AvailabilityCloseout: This product is no longer available
Product Style Black Ops / 3XL RevZilla Item #1833821 Store Sku MFR. Product #F01009700-170-051 AvailabilityCloseout: This product is no longer available
Product Style Black Ops / 4XL RevZilla Item #1833822 Store Sku MFR. Product #F01009700-180-051 AvailabilityCloseout: This product is no longer available
Product Style XS / Cyan/Blue RevZilla Item #1833823 Store Sku MFR. Product #F01009700-110-201 AvailabilityCloseout: This product is no longer available
Product Style SM / Cyan/Blue RevZilla Item #1833824 Store Sku MFR. Product #F01009700-120-201 AvailabilityCloseout: This product is no longer available
Product Style XL / Cyan/Blue RevZilla Item #1833827 Store Sku MFR. Product #F01009700-150-201 AvailabilityCloseout: This product is no longer available
Product Style 2XL / Cyan/Blue RevZilla Item #1833828 Store Sku MFR. Product #F01009700-160-201 AvailabilityCloseout: This product is no longer available
Product Style XS / Storm Chaser RevZilla Item #1833829 Store Sku MFR. Product #F01009700-110-801 AvailabilityCloseout: This product is no longer available
Product Style SM / Storm Chaser RevZilla Item #1833830 Store Sku MFR. Product #F01009700-120-801 AvailabilityCloseout: This product is no longer available
Product Style MD / Storm Chaser RevZilla Item #1833831 Store Sku MFR. Product #F01009700-130-801 AvailabilityCloseout: This product is no longer available
Product Style LG / Storm Chaser RevZilla Item #1833832 Store Sku MFR. Product #F01009700-140-801 AvailabilityCloseout: This product is no longer available
Product Style XL / Storm Chaser RevZilla Item #1833833 Store Sku MFR. Product #F01009700-150-801 AvailabilityCloseout: This product is no longer available
Product Style 2XL / Storm Chaser RevZilla Item #1833834 Store Sku MFR. Product #F01009700-160-801 AvailabilityOnly 1 Left: Ships within 24 hours
Product Style 3XL / Storm Chaser RevZilla Item #1833835 Store Sku MFR. Product #F01009700-170-801 AvailabilityCloseout: This product is no longer available
Product Style 4XL / Storm Chaser RevZilla Item #1833836 Store Sku MFR. Product #F01009700-180-801 AvailabilityCloseout: This product is no longer available

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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4 Customer Reviews
4 5/5
3 Questions & 0 Answers
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