AT4.0 CARBON

Frenzy

$549.00
3303 reviews
Rated 4.5 out of 5 stars
5 stars (2549)
4 stars (307)
3 stars (157)
2 stars (92)
1 star (198)
FREE Shockwave Bluetooth - Limited Stock Extra 10% OFF when you Sign up
CONNECT WITH
Audio + Call Ready
COMPATIBLE WITH
Shockwave Audio
CERTIFICATIONS
DOT ECE 22.06 SHARP 4*
 
Specs & Description
ShellCarbon fiber
WeightSM – 1600g ± 50g
ComfortSport liner — soft + snug fit
Added Safety TechnologyRHEON
Audio / Comms Tech Shockwave Bluetooth Audio ready
*Sold separately
ChinstrapFidlock
CertificationsECE 22.06 | DOT
Field of View (FOV)215°
PinlockPinlock ready
What’s in the BoxClear & tinted visor included

Voted in at the top of the food chain. Chosen by over 100,000 fans worldwide, Frenzy brings the great white grin with razor teeth and a graphic that looks fast standing still. Designed by @dustedink.

Built for real riding. This is a helmet made to disappear once you’re moving. Stable at speed, composed in crosswinds, and designed to reduce fatigue over long days in the saddle.

Premium feel, daily usability. Every touchpoint is tuned for repeat rides. Easy to live with, confidence-inspiring to wear, and made to stay comfortable when the hours stack up.

Sport model for fast, high-octane rides. AT4.0 Carbon takes the Street attitude and dials it up. Stronger, sharper, and more advanced for riders who live for speed, with a true performance edge when you’re pushing on. Explore AT4.0 Carbon.

The value is in the platform. Clean design now, options later. Add Shockwave Bluetooth audio (sold separately) for music, navigation, calls and rider-to-pillion comms. Switch up the look with visors.

What's in the Box - AT4.0 CARBON
What's in the box overview image What's in the box
(Helmet style not shown)
Clear & Tinted Visors Clear & Tinted Visors
Sound dampening ear inserts Sound dampening inserts
Maverick Mask Soft helmet bag
  • AT4.0 CARBON Helmet
  • Tinted Visor
  • Clear Visor
  • Sound dampening ear pads
  • Soft helmet bag
3 year warranty

Ruroc warrants motorcycle helmets to be free of defects in material or workmanship for a period of 3 years from the date of purchase. The warranty is for the original purchaser only (non-transferable). If a product fails due to a manufacturing defect within the warranty period, Ruroc will repair or replace it free of charge, subject to the warranty terms and valid proof of purchase.

What's not covered?

What isn’t covered includes normal wear and tear, damage from accidents/falls/impact, cosmetic ageing/fading due to the elements, and any indirect, incidental, or consequential loss of any kind. For a complete list of what’s not covered, please check our full warranty details.

Crash Replacement (optional add-on)

Crash Replacement is an additional purchase (it's automatically added to your cart when you add a helmet) that covers accidental damage (drops/crashes). If your helmet is damaged in a crash or accident, it lets you replace it with 50% off a new Ruroc motorcycle helmet, as long as it’s redeemed within the helmet’s warranty period and in line with the scheme terms. Full Crash Replacement details can be found in our Terms & Conditions.

View full warranty details here.

Delivery & Returns
  • Delivered in custom protective packaging from our US depot*
  • FREE SHIPPING over $100 via tracked courier
  • FREE RETURNS
  • FREE EXCHANGES
  • Mainland US: up to 5 days from dispatch
  • Alaska & Hawaii: up to 7 days from dispatch
*Orders to Puerto Rico ship internationally from our UK depot. Some spare parts may also ship from the UK.
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 Harman Kardon designed and tuned unit 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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Find your size
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
3303 Reviews
dusan matiasApril 28 2026
Veľmi pekná a hlavne tvar
Laurie MATHIEUApril 28 2026
très beau et bon casque, j'en suis satisfaite!
Khalil HarrisApril 27 2026
***** 5 stars
Hugo BOLZANApril 27 2026
Better than expected
MartinApril 25 2026
Passform super. Verpackung sehr hochwertig, Versand schnell. Optisch ein Hingucker zu einem stolzen Preis.
Paul YoungApril 24 2026
The helmet is a great fit just find it difficult to fully close visor with the tab
Alexis E BrownApril 23 2026
Fits super snug have to force it on. Light doesnt pull
Zac KaripidisApril 21 2026
A bit big but nice.
customerApril 21 2026
The lady loves it, it's her world im just living in it, good design, good helmet,
MICHAEL GIBSONApril 20 2026
Love it. Came quick fits good! Got it on Easter sale with a free visor too!
Luis Torres BerdielApril 20 2026
I love it!!
W.FrancisApril 16 2026
Great Helmet, looks amazing and fits perfectly
CraigApril 13 2026
Love the helmet and how light it is and the fit is perfect ?
Kévin GerstApril 12 2026
Super casque, confortable, livré avec une visière fumée plus les autocollants réfléchissants. Juste avoir dans le temps si le noir mate sur certaines parties « ex: logement pour système Bluetooth »
Mark WhitneyApril 10 2026
Gorgeous, light weight and easy to swap out the visors.
David SjögrenApril 10 2026
Great fit
Renaud DupuisApril 10 2026
J'ai dû renvoyer le casque à regret point car il ne correspondait pas à ma tête. Mais le design est incroyable
TravisHamiltonApril 9 2026
Looks amazing. Fits great. However, getting the padding to go back in and stay in place once installing the Shockwave is a pain. I'm still having issues with it weeks after the installation.
Kyle DasherApril 9 2026
The helmet it's self looks and feels phenomenal, however I do not like how aggravating the headliner is to remove to install the Bluetooth system, that to this point in my owning experience doesn't even work.
SteveApril 8 2026
Its a really kool design but the audio system didn't work so I dont know how the quality really is.