AT4.0 STREET

Ace Cafe

£299.00
306 reviews
Rated 4.4 out of 5 stars
5 stars (224)
4 stars (36)
3 stars (20)
2 stars (9)
1 star (17)
 
Specs & Description
ShellFiberglass
WeightSM – 1550g ± 50g
ComfortComfort liner — soft fit
Added Safety TechnologyN/A
Audio / Comms TechShockwave Bluetooth Audio ready
ChinstrapDD-Ring
CertificationsECE 22.06 | DOT
Field of View (FOV)215°
PinlockPinlock ready
What’s in the BoxClear visor included

The AT4.0 STREET - Ace Cafe embraces the Ace's original black and white colour scheme with a minimalist design. Featuring subtle logos from both Ruroc and Ace Cafe on the front and sides, it's your statement on the streets of London and beyond.

The AT4.0 STREET is no new kid on the block. Cut with all the essential DNA of the AT4.0 CARBON, it's got a mission in mind. Engineered in a lightweight fibreglass shell, it doesn't compromise on toughness, safety or comfort. And with four classic Ruroc designs to back it up, it's got a reputation to go with it too.

The streets are yours in this helmet.

Delivery & Returns
  • Delivered in custom protective packaging from our UK Headquarters
  • FREE SHIPPING over £80 via tracked courier
  • FREE RETURNS
  • FREE EXCHANGES
  • UK Mainland: next-day-delivery from dispatch*
*Scottish Highlands can take up to 2 days from dispatch.
Helmet with DOT and ECE certification
DOT Certified
ECE 22.06 Certified

Seal of Approval.

AT4.0 STREET is ECE 22.06 certified with DOT approval, delivering trusted protection for everyday road riding.

Helmet interior padding

Comfort, Not Compromise.

Super-soft, multi-density pads and headliner keep you in your comfort zone.

Shockwave Bluetooth audio system
Bluetooth

Protection Meets Connection

AT4.0 STREET 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.

DD-Ring chin strap

DD-Ring Chin Strap.

Create the perfect fit with a fully adjustable DD chinstrap.

FAQs

How do you measure for the AT4.0 STREET motorcycle helmet?

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 snug should a new AT4.0 STREET 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.

How do I stretch the inside of my helmet helmet?

Wear it. That's it. The liner compresses naturally over time and will allow more give. If pain persists after 15 hours of riding time, you need the next shell size.

How long do AT4.0 STREET motorcycle helmets last?

Five years from the date of manufacture. All EPS foam degrades over time even if it looks fine. You should always replace a helmet after any impact.

How do I clean the AT4.0 STREET motorcycle helmet liner?

Remove cheek pads. Hand wash cold. Use mild soap only. Air dry for 24 hours. Never machine wash.

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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 Street Range

All reviews are from verified customers

4.4 /5
306 Reviews
Jonathan Aguilar BonillaApril 23 2026
Me gustó mucho aunque me vino pequeño y todavía estoy a la espera de la confirmación de la devolución
PhilApril 15 2026
Sadly had to return this as the size ordered (correctly measured head size) was too tight but got a replacement with no fuss at all...Katie went above and beyond to assist me.
Eric EhrenreichApril 14 2026
Perfection in Design and Materials
Diego Aguado HernandezApril 14 2026
Me encanta!
Scott MusoApril 5 2026
A little tight when new but broke in fast. Great fit. Excellent field of vision, which is what made me try the RUROC. Fit and finish are a 10.
Michael WestonMarch 30 2026
I feel like I'm fucking cool when I wear the helmet I thought it came with a black visor I guess they need to specify that more. And whatever happened to the quick latch system..
Rami KhalifaMarch 30 2026
this design and colour is fire
BenjaminMarch 23 2026
Awsome design and very comfortable to wear
Ahmir Menendez BalanquetMarch 5 2026
Excellent
Kyle MarinoMarch 3 2026
It's not exactly the color I wanted it or the version I wanted, but it was the only thing in stock that appealed to me
BrianFebruary 25 2026
Very windy
jordan castroJanuary 19 2026
Sick as hell!
Derek HammondAugust 26 2025
Finally, helmets which look cool and not boring, or worse, ugly. Excellent build quality all around and sturdy construction.
FlorianAugust 2 2025
Support look, super confort rien a redire c'est top
Trevor GagenJuly 31 2025
Smart product looks gtreat
Evangelos MegaliosJuly 17 2025
Great shape and quality but you need a tinted visor to ride during sunny days
Pelloquin WarrenJuly 10 2025
Taille un peu petit en comparaison du même modèle de même taille, peut très les mousse? A voir a l'usure sinon très bon casque et très joli
Giulio GalanoJuly 7 2025
This helmet is a little bit weighty and bulky...but comfortable and with an enviable style. I thought it would be a little less louder in highway...but it is a good result anyway (compared to other brands).
WardukeJuly 1 2025
Great fit and good Bluetooth
Brook HeadingJune 28 2025
Absolutely love this lid, hardly any wind noise and I ride a ZH2 so all I get is wind, no wind buffering which is amazing when you're pushing on.