AT4.0 CARBON

Liquid Carbon

A$663.75 A$885.00
3489 reviews
Rated 4.5 out of 5 stars
5 stars (2697)
4 stars (324)
3 stars (161)
2 stars (100)
1 star (207)
FINAL REDUCTIONS – LAST STOCK REMAINING SPRING SALE
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

Raw carbon, high gloss. Liquid Carbon shows the weave in full shine. A clear gloss finish that looks engineered, not painted, for riders who want materials-first style.

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 via UPS TRACKED EXPRESS from our UK Headquarters
  • FLAT-RATE SHIPPING of A$59
  • Duties and taxes may apply
  • EASY EXCHANGES via our exchanges portal
  • EASY RETURNS via our returns portal
For orders over A$1,000 (including shipping), import GST, customs duty and clearance charges may apply and be payable via the carrier before delivery.
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.

It looks like you're based in
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
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.