6D Helmets Unveils All-New Alterra Lightweight Full-Face Enduro Helmet

by Brian Mullin on April 9, 2025

The revolutionary helmet design combines strength, superior ventilation and patented safety technology

6D Helmets, pioneers in helmet safety technology and design, proudly introduce the all-new Alterra lightweight full-face enduro helmet. Four years in the making and building on their deep roots in motocross and recent success at the Olympics in BMX and the World Cup Downhill series, 6D’s latest innovation delivers unparalleled protection, comfort, and performance for enduro riders.

6d_alterra_Nik_Nestoroff_in_use

At the heart of the Alterra helmet is 6D’s patented in-helmet suspension and energy management system called Omni-Directional Suspension™ (ODS). ODS reduces energy transfer to the brain over a wider range of energy demands, including low-, mid- and high-velocity impacts for both linear and angular acceleration. This is achieved through the use of a suspended dual-liner assembly that can displace and shear in any direction upon impact. The system has been rigorously tested and proven to offer superior impact mitigation across multiple disciplines.

6d_alterra_Nik_Nestoroff

The Alterra’s in-molded carbon fiber chin bar and carbon internal roll cage further enhance structural integrity while keeping the design lightweight, making it the go-to choice for riders seeking both strength and comfort on the trails.

Complementing the Alterra in 6D’s product lineup are the ATB-2T trail helmet and the ATB-1 downhill BMX helmet, both of which share the same commitment to safety and innovation, making 6D a trusted name across various disciplines.

6d_Alterra_ODS_1

“With all of the exceptional benefits of ODS and its suspended liner system, 6D remains at the forefront of rider safety and performance. We’re excited to be adding another cycling helmet to our collection,” said Bob Weber, CEO and co-founder of 6D Helmets. “The Alterra helmet upholds 6D’s trusted safety standards while also delivering the lightweight construction and superior ventilation that riders demand.”

6d_Alterra_ODS

The Alterra helmet is designed with directional venting and sub-channeling that optimizes airflow throughout the helmet, helping riders stay cool during intense rides. The extra large rear directional exhaust vents efficiently dissipate heat, while large over-brow ventilation channels provide a steady flow of air, enhancing comfort during long rides.

6d_Alterra_ODS_2

Additional features include a polycarbonate shell combined with a multi-impact EPP inner liner and an EPS outer liner for maximum protection. The helmet’s lonic+ antibacterial comfort liner is designed to maximize airflow and maintain hygiene, while its goggle-compatible under-visor storage and glasses compatibility add to the helmet’s versatility.

6d_Alterra_final

The Alterra helmet also incorporates a Fidlock closure system for secure fastening and a 3-position snap-away adjustable visor for customization. The helmet comes with a travel bag and multiple comfort liners and pad sets, allowing riders to achieve the perfect fit.

Key Features:

  • Patented Omni-Directional Suspension™ (ODS): Enhances impact force mitigation for both linear and angular accelerations.
  • In-Molded Carbon Fiber Chin bar and Internal Roll Cage: Adds structural integrity while maintaining a low weight.
  • Polycarbonate Shell: Ensures durability and impact resistance.
  • Multi-Impact EPP Inner Liner and EPS Outer Liner: Provides layered protection.
  • EPP Sternum and Clavicle Crash Pads: Offers additional safety features.
  • lonic+ Antibacterial Comfort Liner: Maximizes airflow and maintains hygiene.
  • Goggle Compatible with Under-Visor Storage: Adds convenience and versatility.
  • Glasses Compatible: Accommodates riders who wear glasses.
  • Directional Venting and Sub-Channeling: Optimizes airflow for enhanced cooling.
  • Extra-Large Rear Directional Exhaust Vents: Ensures efficient heat dissipation.
  • Large Over-Brow Ventilation Channels: Promotes airflow to keep the rider cool.
  • Fidlock Closure System: Provides secure and easy fastening.
  • 3-Position Snap-Away Adjustable Visor: Allows for a customizable fit.
  • Travel Bag Included: For easy transport and storage.
  • Multiple Comfort Liners and Pad Sets: Customizable fit options for all riders.
  • 710g M/L
  • MSRP: $395

The 6D Alterra helmet exceeds CPSC/EN1078/AU/NZS 2063 safety standards and meets the NTA 8776 E-Bike standard as well as the ASTM F1952 (DH) and ASTM 2023 (BMX) standards. Backed by a 3-year limited warranty, the Alterra helmet is available now and is set to redefine safety and performance in the enduro market.

To stay up to date on the latest from 6D, go to www.6dhelmets.com, @6dhelmets on Instagram and 6D Helmets on Facebook.

{ 0 comments… add one now }

Leave a Comment

Previous post:

Next post: