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 Street King Helmet
Rule the road with the Ruroc AT4.0 Street King full face motorcycle helmet, available at Moto Central, your Official Ruroc Sizing Station. This regal-renegade helmet boasts a sleek matte black finish accentuated by a hand-laid gold etched skull and grey steel details – truly fit for a king of the streets. The AT4.0 Street King motorcycle helmet features a refined and redesigned shell, a perfect blend of safety and style crafted with feedback from riders and engineers alike. At Moto Central, we are proud to offer this striking Street King design and, as your dedicated Ruroc partner, we can order any colour and size from the extensive AT4.0 range to meet your exact preferences. Simply let us know your desired specifications, and we'll arrange it for you.
The AT4.0 Street King motorbike helmet doesn't just look the part; it offers phenomenal safety with its impressive ECE 22.06 safety certification. Comfort is also paramount, with new intelligent contouring cheek pads made from a premium sweat-wicking fabric encasing multiple layers of multi-density foam, providing the secure and comfortable ECE 22.06 fit. We understand that both safety and comfort are essential for every ride. To further enhance your experience, the AT4.0 boasts improved acoustic performance, 57% quieter than previous AT iterations, thanks to a more streamlined shell with the removal of the two top vents and the addition of sound-dampening ear inserts. For even greater safety, the AT4.0 motorcycle helmet incorporates a RHEON™ headliner, utilising reactive polymers with non-Newtonian fluid properties to reduce rotational and impact forces in conjunction with the EPS.
While the AT4.0 is Ruroc's quietest motorcycle helmet ever, you can further enhance its functionality with the optional Shockwave™ Bluetooth insert (sold separately). This seamlessly integrates into the rear of the helmet, delivering high-quality audio with rich bass for up to 8 hours of playtime via a convenient USB-C rechargeable battery. Customise your AT4.0 Street King with our wide range of helmet visors, easily interchangeable thanks to the quick-release thumbscrews. The helmet comes equipped with a clear visor for road use and includes a secondary tinted visor for track days. All our visors are also compatible with Pinlock® inserts (available separately) for effective anti-fog protection. Visit Moto Central today, your Official Ruroc Sizing Station, to experience the commanding Ruroc AT4.0 Street King and explore the vast array of Ruroc helmets and accessories available. Remember, we can order any colour and size to perfectly suit your individual style and needs.
Key Features:
- ECE 22.06 & DOT FMVSS 218 certified
- Ultra-tough Carbon fibre shell construction
- Features RHEON impact technology for superior safety
- Multi-Density EPS for targeted impact protection
- Premium headliner and multi-density cheek-pads for optimised comfort and fit
- Edge-to-edge coverless visor with an ultra-wide 215-degree field of view
- Simple and secure Fidlock chinstrap
- Compatible with the integrated Shockwave Bluetooth communication system
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.