One of the 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 superlight 509 Altitude Carbon Fiber Pro R-Series Helmet is racing-certified and 100% carbon with the secure fit of a dual D-ring chin strap and the MIPS Brain Protection System for ultimate safety.
- Comes standard with universal camera mount
- Comes with Dual D-ring chin strap for a secure fit
- 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
- 8 sizes across 3 outer shell molds ensure excellent fit
- MIPS™ equipped helmet
- Meets and exceeds DOT & ECE 2205 safety certification
- DOT/ECE helmet weight from 1230 grams
What Is MIPS?
In a helmet with MIPS Brain Protection System (BPS) the shell and liner are separated by a low friction layer. When a helmet with a MIPS Brain Protection System is subjected to an angled impact, the low friction layer allows the helmet to slide relative to the head. The MIPS BPS is designed to add protection in helmets against the rotational motion. The rotational motion is a combination of rotational energy (angular velocity) and rotational forces (from angular acceleration) that both affects the brain and increases the risk for minor and severe brain injuries. MIPS BPS has been proven to reduce rotational motion when implemented in a helmet by absorbing and redirecting rotational energies and forces transferred to the brain.
A helmet with the MIPS Brain Protection System offers better protection against rotational motion than one without MIPS. Since 1996 research and tests have been performed to compare a helmet with the MIPS Brain Protection System to a conventional helmet. The results showed that it was possible to redirect and reduce the rotational motion transmitted to the brain by adding the MIPS Brain Protection System.
The Great Misconception
Accident statistics show that many injuries occur due to angled impact to the head. However, in standard tests, the helmet is dropped vertically onto a flat surface. The results are helpful for measuring precise vertical impacts, but inferior for measuring the more realistic scenario of an angled impact. MIPS has been developed for reality and increases protection against angled impacts.
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.