AT4.0 CARBON

Fenrir - Blemished

$274.50 $549.00
3489 reviews
Rated 4.5 out of 5 stars
5 stars (2697)
4 stars (324)
3 stars (161)
2 stars (100)
1 star (207)
 
Specs & Description

Fenrir the wolf with unparalleled strength and boundless evil, not even the spell-cast chains, conjured by the Gods, could prevent the chaos Fenrir will cause in the doomsday that is Ragnarok. The ATLAS 4.0 full face motorcycle helmet introduces an intricate handcrafted gold leaf design, featuring Fenrir the wolf and its snarling teeth, shrouded in ornate urnes style pattern-work. This is the ultimate motorcycle helmet for the leader of the pack or the lone rangers. The ATLAS 4.0 Fenrir is one of the first motorcycle helmets to ship with the impressive ECE 22.06 safety rating, Ruroc’s ATLAS 4.0 helmets surpassed all tests by at least 20%. Comfort is key for long rides and the ATLAS 4.0 Fenrir motorbike helmet has brand new cheek pads which are constructed from a premium sweat-wicking fabric and contain multiple layers of multi-density foam allowing intelligent contouring around your face. We have partnered up with RHEON™ to give you a reactive polymer headliner with extra foam padding for comfort. The reactive polymers have non-Newtonian fluid properties which help reduce linear impact and rotational forces and keep your head even safer. 

With the new streamlined shell, long rides will be less strenuous on your neck muscles as there is less air resistance on the helmet, this also helped with our mission to make the helmet quieter. The sound dampening ear inserts along with the streamlined shell provide a quieter acoustic experience which can help to lessen rider fatigue over longer distances. Climate control has never been better in an ATLAS helmet with the front and top vents being fully adjustable with a total of 4 positions so you can adjust the temperature of your head in both hot and cold climates. 

 

The ATLAS 4.0 is Ruroc’s quietest motorcycle helmet ever but why not improve the functionality and entertainment and upgrade it to a Bluetooth motorcycle helmet with our Shockwave™ Bluetooth insert (sold separately). The ATLAS Shockwave™ is easily installed with a seamless fit into the rear of your helmet. The ATLAS Shockwave™ now has a 60% smaller mic and low-profile speakers that deliver high-quality audio with rich bass for 8 hours of playtime with a USB-C rechargeable battery.

The ATLAS 4.0 Fenrir can be transformed and customised with our wide range of helmet visors. We offer 7 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 that can easily be installed for anti-fog protection (available separately).

Delivery & Returns
  • Delivered via a premium TRACKED EXPRESS COURIER from our UK Headquarters
  • FLAT-RATE SHIPPING of $35*
  • Duties and taxes may apply
  • EASY EXCHANGES via our exchanges portal
  • EASY RETURNS via our returns portal
Import charges are set by local customs authorities and may vary by destination and order value. Return label costs apply.

*A temporary $10 surcharge applies on orders to Iraq, Lebanon, Nepal and Qatar.
Helmet with DOT and ECE certification
DOT Certified
ECE 22.06 Certified

Seal of Approval.

AT4.0 CARBON is engineered for safety performance, exceeding ECE 22.06 requirements by a minimum of 20%, and carrying DOT approval and a SHARP 4-star rating.

Helmet interior padding

Ultimate Comfort

The fully re-engineered internals, including head-liner and cheek pads, take fit, comfort, acoustic control and support to a whole new level.

RHEON™ Protection

The world’s first road-ready motorcycle helmet to feature RHEON™ technology. Next-level protection seamlessly integrated into the AT4.0 head-liner.

Shockwave Bluetooth audio system
Bluetooth

Protection Meets Connection

AT4.0 CARBON is compatible with the Shockwave Bluetooth audio system. Featuring seamless helmet integration, the system delivers rich & crisp audio.

215 degree field of view

Maximum Vision

Featuring 215° horizontal and 100° vertical field of vision, the AT4.0 edge-to edge visor maximises peripheral vision. Anti-scratch dipped, Pinlock 70 compatible, and made from Optical Grade Ballistic Polycarbonate, this is vision reinforced.

Helmet ventilation system

Full Climate Control.

Take full control of your helmet environment with open/close vents & tune your thermal comfort in both warm and cool climates.

FAQs

How do I know what size AT4.0 CARBON motorcycle helmet to get?

Take a fabric measuring tape, wrap it around your head just above your eyebrows and ears. Pull the tape until comfortably tight. Take the measurement. Our motorcycle helmet fit is intermediate oval.

How tight should the AT4.0 CARBON motorcycle helmet be?

A helmet should feel snug, with even pressure around your crown and a firm cheek bite. Cheek pads bed in over time, so it shouldn't feel loose (or "perfect") straight away. There should be no helmet movement when turning from side to side. A snug fit is essential for safety.

Does carbon fiber perform better?

Carbon fiber delivers a perfect balance of light weight and superior impact absorbing characteristics, making it a great choice for motorcycle helmets.

What is RHEON™?

It's impact tech that hardens on crash impact, preventing injuries from linear and rotational impacts. Standard headliners can't do this. RHEON™ can.

What buckle does the AT4.0 CARBON motorcycle helmet use? Is it safe?

Fidlock. It's magnetic + mechanical. The magnet pulls the tab in. The mechanical lock holds it. To open, pull tab which will open the mechanism. Wind won't open it. Crashes won't open it. It's much quicker to use than a double D-ring and just as safe.

How do I clean the AT4.0 CARBON motorcycle helmet visor without scratching it?

Rinse the visor first, grit is the enemy. Use mild soap and a microfiber towel. Wipe off. For longlasting protection, order one of our Muc-Off Helmet Cleaning Kits.

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We recommend:
How to measure
  1. With a fabric measuring tape, wrap it around your head just above your eyebrows and ears.
  2. Pull the tape comfortably tight. Take the measurement.

Our motorcycle and snow helmet fit is an intermediate oval.

Returns policy

If the fit is not quite right our return process is simple. 14 days to exchange, picked up from home. See our returns page for more details.

Reviews for AT4.0 Carbon Range

All reviews are from verified customers

4.5 /5
3,489 verified reviews
5 77%
4 9%
3 5%
2 3%
1 6%
What riders love
Style5.0 / 5.0
Comfort4.8 / 5.0
Features4.6 / 5.0
Tech4.8 / 5.0
What riders say
FitRuns smallRuns large
WeightLightHeavy
VisionNarrowWide
Noise levelQuietLoud
Verified reviews Showing 20 of 3,182
DanSeptember 19 2026
Amazing helmet, just wow
Leslie AlbarranSeptember 18 2026
Muy feliz con la compra
Ionuț BaicanSeptember 18 2026
Lovely helmet,so light and comfortable,will get more 😀
JoeSeptember 18 2026
Look dope and fits perfectly now
ChadSeptember 18 2026
Great helmet it looks amazing I like the bigger field of vision.
Paul DodgsonSeptember 18 2026
Brilliant helmet very comfortable and it’s got presence on the road .
Sławomir MierzejewskiSeptember 18 2026
Super fajny kask spełnia wszystkie mojej oczekiwania
Matt GreeneSeptember 16 2026
I did not give it 5 star because I think the retention system for the removable padding could be a little tighter. My snaps have come undone a few times so far.
Henry PutalaSeptember 14 2026
Ur chin strap sucks
MattSeptember 11 2026
Great helmet & great service, top!
KikoSeptember 10 2026
I don't Think 🤔 I am Wearing it 🥰
James BoddySeptember 10 2026
Couldn’t find any blemish on it though that was why it was discounted. Strap takes a bit of getting used to and a bit tight size wise if I have to be critical but overall excellent service and descent helmet and great design.
George van NikkelenSeptember 9 2026
The helmet has a perfect fit and is quiet during my drives. And it looks great while driving.
Christofer KadforsSeptember 7 2026
Great product.
Emilio DuarteSeptember 7 2026
Very good ….
JeromeSeptember 4 2026
Good product
Juan Manuel ALVAREZ MontelongoSeptember 3 2026
Calidad brutal y diseño Magico
John DossettSeptember 3 2026
Very beautiful design and good quality helmet
SchlossySeptember 2 2026
Helm sitzt super, Helmöffnung etwas eng…
Angela Gil GómezAugust 29 2026
Espectacular en cuanto diseño y prestaciones, un casco que no pasa desapercibido.