One of the industry's bestselling helmets ever, the 509 Altitude series excels across four key principles: safety, performance, fit, and style. Revolutionary design means precision fit and sleek profiling that exceeds the competition, plus innovative venting and all-day comfort for aggressive riding. The 509 Altitude Helmet features the Fidlock® magnetic strap buckle for easy one-handed operation, plus customizable elements like a removable cold weather breathbox.
- Removable vent stoppers for customized ventilation
- Comes standard with universal camera mount
- Comes standard with Fidlock® easy-open magnetic strap clasp
- Comes standard with our new Pro Series Liner and Cheekpads
- Comes standard with a cold weather breathbox
- Innovative aerodynamic channels & 8 intake/exhaust vent ports
- 11 Sizes across 4 outer shell molds ensure excellent fit, Youth SM - Adult 4X
- Meets and exceeds DOT & ECE 2205 safety certification standards
- One piece eye port trim
- Perfect 509 goggle fit
- Revolutionary neck brace ready shell profile
- Custom fit eps, specially designed for North America
- Special designed expanded polyurethane chin insert
- Removable, washable premium liner
- Dual density, interlocking eps
- DOT/ECE helmet weight from 1380 grams
Measuring the circumference of head, just above the top of the ears and brows.
|US Hat Sizes
||6 5⁄8 - 6 3⁄4
||6 7⁄8 - 7
||7 1⁄8 - 7 1⁄4
||7 3⁄8 - 7 1⁄2
||7 5⁄8 - 7 3⁄4
||8 - 8 1⁄8
||20 7⁄8 - 21 1⁄4
||21 5⁄8 - 22
||22 3⁄8 - 22 3⁄4
||23 1⁄8 - 23 1⁄2
||23 7⁄8 - 24 1⁄4
||25 - 25 3⁄8
||53 - 54
||55 - 56
||57 - 58
||59 - 60
||61 - 62
||64 - 65
The Altitude helmet meets or exceeds DOT & ECE 2205 safety certification standards. It features an innovative dual density, interlocking EPS foam liner that provides top crash protection in the event of an accident. The front chin area of the helmet is protected by a specially designed expanded polyurethane chin insert that provides front impact protection. The outer shell is made of specially designed carbon fiber for maximum shell strength with minimal weight.
In addition to its safety accolades, performance was a key focus during the development process. Innovative aerodynamic channels run across the entire contour of the helmet. These channels are integrated directly into shell and direct adequate air flow into the specially designed vent scoops. The Altitude helmet features 6 integrated vent scoops that provide necessary ventilation to keep you comfortable when riding. Overall, the Altitude features 8 intake/exhaust vent ports. And for those cold days, snap in the included cold weather breath box. The unique aerodynamic visor features a locking-top center mount that holds the visor in place and prevents unwanted visor movement.
The Altitude was designed with two key fit metrics in mind: Rider fit & Goggle fit. First, we created a custom interior EPS matched with a premium removable liner. The Carbon Fiber Altitude is available in 8 sizes from XS to 4XL (Thermoplastic Altitude available in 11 sizes from Youth small to Adult 4XL). These 8 sizes are carefully designed across 3 outer shell molds - our competitors only use 2. This provides a precision fit, while minimizing overall helmet circumference. The neck brace ready, contoured shell base provides a comfortable, yet snug feel when putting the helmet on. When the helmet is fully in place it provides an unmatched comfort fit that prevents unwanted helmet movement. The eyeport of the Altitude helmet was carefully crafted to fit our 509 goggles perfectly, further improving our world famous "509 helmet & goggle combo" fit. The Altitude helmet & 509 brand goggles are two product designed to fit and perform at the highest level when used in combination. And because fit is only as good as the overall weight, the Carbon Fiber Altitude weighs in under 1100g while the Thermoplastic Altitude starts at a class leading 1260g.
Finally, the always important STYLE FACTOR. We wanted this helmet to not only perform at the highest level, but to look good doing it. The shell features sleek, yet aggressive lines that provide an innovative and unmatched look. Everything - from the integrated front mouth vent, to the innovative ventilation channels, to the sweeping upward-kicked visor - provides a flowing and seamless transition. Last, but definitely not least, we know you want to show off your riding talent while wearing the Altitude helmet. That's why each Altitude comes standard with an innovative universal camera mount that mounts securely in seconds to the top visor mount.