6D ATR-2 Alpha Motocross Helmet - Cyaan

The 6D ATR-2 is one of the most advanced motocross helmets on the market. It features an advanced energy management system which controls both linear and angular impacts. The 6D ATR2 is equipped with the ODS system, which stands for Omni-Directional Suspension. The unique system beats the competition in terms of protection. In a ‘time-to-peak-force’ test the 6D ATR-2 had the longest time to reach the peak stress. The longer the time to peak the better the system dampens an impact. The new system also beats the last version, the ATR1, with better dampening at low, mid and high speed impacts for both linear and angular accelerations.

Helmet Features:

• Removable, washable comfort liner features Genuine Dri-Lex® anti-bacterial fabric
• Emergency Quick-Release Cheek Pads
• PU-over molded EPP lined chin bar includes Sternum Pad
• Goggle band integrated shell recess at the eyeport area improves goggle fit and seal
• Shear-Away Visor Screws designed to reduce angular acceleration potential
• Nose guard provides improved roost protection
• Titanium D-Rings
• Light weight with improved center of gravity (+/- 1480 grams Size M)
• Exceeds DOT, ECE, ACU and ASTM Standards

Rebuildable ODS System:

• Patented Omni-Directional Suspension® (ODS®)
• Improved ODS design mitigates Angular and Linear Accelerations
• Replaceable Inner EPS Liner
• Multi-impact EPP Outer Liner incorporates Isolation Damping Towers
• Rotational Energy Management Disks reduce Angular Acceleration
• Superior low, mid, and high velocity impact mitigation
• Air-Gap Ventilation System with 17 Transfer Ports

Shell features:

• Optimized compliant light weight Tri-Composite Shell provides superior energy absorption
• 3 Shell Sizes optimize the size to weight ratio
• Rear lower shell incorporates compliant zone at the cervical spine location
• Brow Rib increases shell integrity above the eyeport
• 9 Intake Ports and 6 Exhaust Ports work in unison with the Air Gap Ventilation System
• Clavicle Cut-Away provides increased clearance

1. Multi-impact outer liner

6D strategically positioned the multi-impact EPP outer liner against the helmet shell’s inner surface. An exceptional energy absorption material, the EPP was specifically engineered with islands of EPP “Damping Towers” to assist in progressive loading of the ODS system during impacts. The multi-impact capability of the EPP is one of the key elements that allows the rebuilding* of the ATR-2 after a moderate to severe impact. *Provided the helmet’s shell is not compromised from the impact event.

2. Low-friction disks

Multiple smooth disks top the damping towers to reduce friction under loading thereby assisting in angular acceleration mitigation.

3. Elastomeric isolation dampers

An array of Isolation Dampers connect the ODS carrier to the outer EPP liner and work in unison to isolate impact energy from the brain. The elastic properties of the dampers, combined with their unique shape provide a progressive spring rate that assists in managing low-threshold energy. The hour glass shape and elastic property also work to manage the 3-dimensional displacement of the inner liner.

4. Optimized shell design

The 6D concept of ‘Optimized Shell Design’ does not define one element, but a system where multiple materials work together, in concert, to provide greater protection and energy management. The shell must have the structural integrity to prevent penetration, but it should not be overly stiff or rigid either. An overly stiff and rigid shell can seriously compromise the helmet’s energy management potential.

5. Replaceable Inner liner

The inner EPS liner is the first layer of defense and a very important component of the new advanced ODS design. It is effectively a helmet within a helmet. It has its own in-molded PVC (Polyvinyl Chloride) shell that serves many functions. It nests into the ODS carrier, provides strength and integrity to the EPS, and serves as a slippery surface to aid in reducing angular acceleration forces. The EPS is of a softer density than the EPP and is secured into the helmet with 4 locking pins that mate to the ODS carrier. It is also captured by the Chin Bar EPP which provides additional security.

6. ODS carrier

The ODS carrier allowed the development of a modular helmet design that is easily rebuildable. The carrier also supports the isolation dampers and helps to manage the system materials during impact, compression, and shearing loads. ODS self-re-centers post impact.

7. New safety features

Two new safety elements have been engineered into the new 6D ATR-2. The first, a structural “Brow Rib” provides incremental strength to the upper eyeport area providing additional integrity to the shell nearest the eyeport opening. Additionally, a strategically designed “Cervical Protection Zone” nests inside the lower rear base of the helmet. This area is designed to provide a more compliant crushable region in the event the helmet is pushed down and back into the neck and spine during an accident.

8. Epp lined chinbar

Thicker lower density EPP lined chinbar is more durable and provides more energy absorbing material for side impacts to the jaw area. The 6D ATR-2 chinbar includes a polyurethane over-molded sternum pad.

Test Results: Broad-range protection

The Most Compliant Energy Management Solution Available. From low to high velocity impacts the ATR-2 out- performs the market competitors by significant margins. The advanced ODS system is freer to manage shearing loads while managing linear compressions with a combination of isolation dampers and variable height EPP damping towers.

Test Results: Low-threshold energy

Low Velocity Impacts are Far and Away the Most Common Type of Off-Road Accidents.

Medical research has provided alarming conclusions surrounding the causes, severity, and long-term effects of concussions. Even seemingly minor concussions may have much more serious long-term effects on the brain.

Low-Threshold Energy is the most concerning problem facing the athlete today, illustrated in this simple graph below. As you can see, the energy transfer in all the competitive helmets referenced is at, or above the concussion threshold for an adult male and accurately represents the market.

6D’s Omni-Directional Suspension (ODS) starts working the instant any force is applied to the shell. Its suspended inner liner travels and shears under crash impact loading thereby reducing energy transfer to the brain.

Test Results: Time-to-peak (TTP)

Time is Critical in Reducing Energy Transfer to the Brain.

Time-To-Peak (TTP) is the measurement of time (in milliseconds) it takes the energy of an impact to reach maximum (peak) G force. Deceleration time is the single most beneficial component of reducing the severity and magnitude of any impact. The more time, the less severe the energy transfer will become.

6D’s advanced ODS technology buys time.

Test Results: Angular Acceleration

Angular Acceleration Force is the Primary Cause of Concussion.

Angular acceleration (rotational force) is generated from oblique angle impacts to the helmet surface resulting in shearing, stretching, and tearing, of the soft tissues within the brain. The medical community has determined that angular acceleration is the primary cause of concussion, traumatic brain injury and worse.

Laboratory testing at Wayne State University* has proven that a helmeted head sustained the same degree of angular acceleration as the un-helmeted head when subjected to identical impacts. This is because the helmet is directly “coupled” to the wearer’s head. One of the major benefit features of Omni-Directional Suspension (ODS) is that it effectively “uncouples” that relationship allowing the shell and outer liner to shear independently to the inner layer and the head-form; thereby scrubbing off a high percentage of the angular acceleration force.