Product Details
Size Guide
XS | S | SM | ML | L/XL | XL/XXL |
---|---|---|---|---|---|
54-54.9cm | 55-55.9cm | 56-57.4cm | 57.5-59.9cm | 60-61.9cm | 62-63cm |
Ruroc AT4.0 Carbon Jormungandr Helmet - Official Ruroc Sizing Station: Moto Central
Discarded into the great ocean, Jormungandr grew to become the colossal venomous world serpent, wrapping itself around Earth and tightly grasping its own tail. Once this bond is broken, Ragnarok is inevitable. Embrace the legend with the Ruroc AT4.0 Carbon Jormungandr full-face motorcycle helmet, now available at Moto Central. This helmet is packed with leviathan's razor-sharp teeth, wrapped in scaled armour etched with runic lettering on a stunning decal that spans the new re-engineered AT4.0 shell. The AT4.0 Jormungandr motorcycle helmet proudly boasts an impressive safety standard of ECE 22.06. Experience a premium feel and greater comfort with the new, fresh cheek pads featuring tailor-made sweat-wicking premium fabric containing multi-layered, multi-density foam for smart contouring of the rider's face. The streamlined shell incorporates open and close vents on the top and front, offering four vent positions to enhance climate control possibilities in both hot and cold environments. Sound-dampening inserts and reduced air resistance on the shell provide the rider with quieter acoustics when travelling at speed. The new headliner integrates RHEON™ technology, providing Ruroc 4.0 motorcycle riders with extra protection from linear impact and rotational forces applied to their head, achieved through the use of reactive polymers with non-Newtonian fluid properties. At Moto Central, our expert team is trained to provide precise sizing advice, ensuring your AT4.0 Carbon Jormungandr fits perfectly for maximum safety and comfort on every ride. As an Official Ruroc Sizing Station, we proudly showcase this striking Jormungandr design and can order any colour and size variation within the AT4.0 range directly into our store, exclusively for our customers. Conquer the road with the perfectly sized Ruroc AT4.0 Carbon Jormungandr from your official Ruroc experts.
The AT4.0 is Ruroc's quietest motorcycle helmet ever, but you can further enhance its functionality and entertainment by upgrading to a Bluetooth motorcycle helmet with our Shockwave™ Bluetooth insert (sold separately). The AT Shockwave™ installs easily with a seamless fit into the rear of your helmet. The AT Shockwave™ now features a 60% smaller microphone and low-profile speakers that deliver high-quality audio with rich bass for up to 8 hours of playtime on a single USB-C rechargeable battery. The AT4.0 Jormungandr can be transformed and customised with our wide range of helmet visors. We offer seven additional coloured visors that are easily changeable with our quick-release thumbscrews. The helmet comes with a pre-installed clear visor for road use and a secondary tinted visor for track use only. All our visors are compatible with Pinlock® inserts (available separately) for effective anti-fog protection. Trust Moto Central, your Official Ruroc Sizing Station, for the perfect fit and the best selection of Ruroc helmets.
Key Features
- Striking Jormungandr design with leviathan's teeth, scaled armour, and runic lettering
- ECE 22.06 & DOT FMVSS 218 certified for superior safety
- Ultra-tough Carbon fibre shell construction for lightweight strength
- The World's first road helmet to Integrate RHEON impact technology for enhanced protection against linear and rotational forces
- Multi-Density EPS for targeted impact protection
- Premium headliner with integrated RHEON™ technology for increased energy dissipation and comfort
- New premium sweat-wicking multi-density cheek pads for optimised comfort and intelligent facial contouring
- Edge-to-edge coverless visor with an ultra-wide field of view (215 degrees) for maximum visibility
- Super simple-yet-secure Fidlock chinstrap for easy and safe fastening
- Streamlined shell design for reduced air resistance and quieter acoustics
- Sound dampening inserts for a quieter riding experience
- Adjustable open and close vents on the top and front with 4 vent positions for enhanced climate control
- Compatible with our integrated Shockwave™ Bluetooth communication system (sold separately) with high-quality audio and 8-hour playtime
- Includes a pre-installed clear visor for road use and a secondary tinted visor for track use
- Customisable with a wide range of 7 additional coloured visors with quick-release thumbscrews
- Compatible with Pinlock® inserts (available separately) for effective anti-fog protection
As an Official Ruroc Sizing Station, Moto Central is your ultimate destination in the UK for all things Ruroc. If you require a different colour or size of the Ruroc AT4.0 Carbon Jormungandr helmet, or any other helmet from the Ruroc collection, please do not hesitate to contact our expert team. Our unique position as a sizing station means we can ensure the perfect fit and order any specific requirements directly into our store, exclusively for you. Trust Moto Central for unparalleled expertise and customer service when it comes to Ruroc helmets, ensuring you ride with the ultimate combination of safety, performance, and a truly unique, mythologically inspired style.
Reviews & Questions

About Ruroc
Ruroc is a British helmet brand recognised for blending bold design with advanced safety technology. After making its mark in snow sports, the brand entered the motorcycle world with its Atlas range—helmets known for aggressive styling, aerodynamic performance, and high-spec construction.
Designed in the UK, Ruroc helmets offer a unique combination of style and protection. With each new model, they continue to refine comfort, noise reduction, and overall performance—making them a standout choice for riders looking for something different.