6D ATR-2 Helmet - Matte Black - XLarge - [Blemish]

6D ATR-2 Helmet - Matte Black - XLarge - [Blemish]

***Helmet in very good condition. Very light scuff on top and rear of helmet from shipping. Comes in original packaging.***

The ATR-2 with advanced ODS provides substantial improvements in performance over the current ATR-1 across the entire range of energy demands; low, mid, and high velocity accelerations for both linear and angular accelerations and is also easily rebuildable for a potentially longer service life. This Improves rider safety and saves the consumer money. From low to high velocity impacts the ATR-2 out performs the market competitors by significant margins.

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)
• Includes Premium Helmet Bag
• Exceeds DOT, ECE, ACU and ASTM Standards
• 3-Year Limited Warranty
• 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
  • Clavicle Cut-Away provides increased clearance
  • 9 Intake Ports and 6 Exhaust Ports work in unison with the Air Gap Ventilation System

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.

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.

Low-Friction Disks: Multiple smooth disks top the damping towers to reduce friction under loading thereby assisting in angular acceleration mitigation.

Multi-Impact Outer EPP (Expanded Polypropelyene) 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.

Replaceable Inner EPS (Expanded Polystyrene) 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.

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.

New Safety Features: Two new safety elements have been engineered into the new 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.

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. It also includes a polyurethane over-molded sternum pad.

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.

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. No other helmet company cared about low-threshold energy transfer before 6D brought the issue to light in 2013. This is the most critical performance range of helmets and covers all impact velocities below the certification standard’s requirements, for both linear and angular accelerations. Low-Threshold Energy is the most concerning problem facing the athlete today, illustrated in this simple graph to the right. 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.

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.

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.

Omni-Directional Suspension Technology – Exclusive in 6D Helmets: 6D’s revolutionary patented Omni-Directional Suspension (ODS) embodies a fully active, in-helmet suspension and kinetic energy management system. The goal was simple; design a helmet that reduced energy transfer to the brain over a much broader range of energy demands, including LOW, MID, and HIGH-VELOCITY impacts for both LINEAR and ANGULAR ACCELERATIONS. 6D’s suspended dual-liner assembly will displace and shear omni-directionally when subjected to impact. This capability provides significantly improved performance against both linear and angular accelerations. There is simply no other helmet technology that can provide these combined energy management benefits.

Elastometric Isolation Damper: This damper is the heart and soul of 6D’s exclusive ODS technology. An array of dampers work in unison with the dual EPS liners to isolate impact energy from your brain. The elastic properties of the dampers, combined with their unique ‘hourglass’ shape provide a progressive spring rate that manages low and mid-threshold accelerations, while simultaneously allowing the inner EPS  liner to displace and shear in 3-dimensional space within itself. This omni-directional suspension capability provides ‘six degrees of freedom’, which became the inspiration for the company's name; ‘6D Helmets.’

Angular Acceleration Energy: Angular acceleration is defined as the rate of change of angular velocity over time. Angular acceleration is generated from oblique angle impacts to the helmet’s surface and is particularly concerning to one’s health and long-term well-being. The medical community agrees that angular acceleration is a primary cause of concussion (a mild-traumatic brain injury (MTBI)), and traumatic brain injury (TBI). These types of injuries occur from oblique impacts to the helmet and are serious. The result of this type of impact, and subsequent energy transfer to the brain, is shearing, tearing, compression, and rotations of the brain within the skull. Experiments conducted by David C. Viano, PhD. M.D. at the Bio-Engineering Center at Wayne State University confirmed that a helmeted head sustained the same degree of angular acceleration as the un-helmeted head when subjected to identical impacts. So, if angular acceleration is a major cause of concussion (or worse), how is the brain protected by traditional helmet design? Unfortunately, in respect to angular acceleration, it is not.

The graphs shown here identify how 6D’s proprietary Omni-Directional Suspension technology dramatically reduces the transfer of angular acceleration to the head form during both a high-velocity and low-velocity impact. When thinking in terms of “less is more”, this significant reduction in energy transfer most certainly has to be to the benefit of the athlete during a crash event. 

*(LOW-VELOCITY) PEAK ANGULAR ACCELERATIONS DURING INCLINE ANVIL TESTING AT 3M/SEC, FRONT.

**(HIGH-VELOCITY) PEAK ANGULAR ACCELERATIONS DURING INCLINE ANVIL TESTING AT 6M/SEC, LEFT FORWARD.

Low-Threshold Energy (Low-Velocity Impacts): Recent medical research has provided alarming conclusions surrounding the causes, severity, and long-term effects of concussions. We now know that even seemingly minor concussions (‘I’m fine, I just rang my bell’) may have much more serious effects on the long-term health and well-being of one’s brain. It’s well documented that concussions can occur from impacts in the lower range of 60 G’s** in adult males and may be location dependent. This value is even less in women and children. To meet high certification test velocities, conventional helmets are simply too stiff to effectively absorb energy from impacts at lower impact velocities. The vast majority of impacts in ‘real world’ crashes are what we qualify as ‘low-threshold energy’ impacts well below the pass/fail certification velocities, but at or above the velocity necessary to sustain a concussion or brain injury. In this critical area of energy management the 6D helmet pays huge benefits when compared to traditional helmet designs. 6D’s proprietary ODS starts working the instant any force is applied to the shell, making the helmet much more compliant and progressive on the highest percentage of ‘real world’ crash impacts.

Superior High-Speed Impact Performance: Across the entire range of impact velocities the ODS technology consistently outperforms the competition.  6D engineers meticulously evaluate the shell design, shell layup, damper array, damper durometer, and EPS densities to provide the best possible matrix of the materials for superior impact management performance. No other system or technology is more technically advanced or capable of reducing energy transfer to the brain.

It's All About Time: Time to peak (TTP) is the measurement of time (in milliseconds) it takes the energy of an impact to reach the 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 proprietary ODS technology buys time, in fact more than doubles the TTP in most impacts below 6 m/sec! The really cool news here is the significant reduction in energy transfer that comes simply with time.

Independent Laboratory Testing: The exceptional test results in this catalog are the actual test data generated from hours of testing the 6D ATR-1 helmet against current model SNELL, ECE and DOT certified helmets in a fully-independent, third-party laboratory testing facility; Dynamic Research, located in Torrance, California. Dynamic Research is recognized as the leader in helmet testing, evaluation and is a pioneer in measuring and evaluating angular acceleration energy.

WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.