Handcrafted in Japan since 1937
Engineered to Save Lives
Nearly a century of obsession with one thing — protecting the rider's head. Every Arai is hand-built, one at a time, by craftsmen in Saitama, Japan.
Shop All Arai Helmets🛠️
Hand-Built in Japan
Every Arai shell is laid up by hand in Saitama, Japan, and inspected by the craftsman who built it. No robots, no shortcuts.
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The R75 Shape
No part of an Arai shell has a curve tighter than 75mm. The result: impacts glance off instead of catching and snapping the neck.
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Built to Fit You
Three shell shapes, interchangeable cheek pads in 5mm increments, and swappable crown liners. Fit isn't an option — it's the entire point.
The Arai Difference
Why an Arai Looks Like an Egg
Look at most modern sport helmets and you'll see angular vents, sharp ridges, aggressive scallops. Now look at an Arai. The shell is smooth, round, almost organic — what Arai calls the R75 shape: no part of the shell has a curve with a radius smaller than 75mm.
That's not for looks. In a crash, a smooth shell glances off the pavement. An angular shell catches, and a catching shell rotates the head violently — the leading cause of brain injury in motorcycle crashes.
Arai's founder Hirotake Arai had one rule: nothing goes on a helmet that compromises this round, smooth, strong shape. That rule still governs every Arai built today.
"A helmet's first job is to get out of the way of the impact."
Find Your Shell Shape
Arai builds three different shell shapes to match three different head shapes. The same helmet model in the wrong shell will never fit right — no matter the size. Find yours below.
Intermediate Oval
Slightly longer front-to-back than side-to-side. The most common North American head shape.
You're likely this shape if:
- Most modern helmets fit you reasonably well
- No pinching at temples or forehead
- Helmet doesn't rotate when you shake your head
Arai models with this shell:
Corsair-X, Regent-X, Contour-X
Long Oval
Noticeably longer front-to-back, narrower at the temples. About 20% of riders fit this profile better than IO.
You're likely this shape if:
- Helmets feel tight at forehead and back of head
- Cheek pads feel loose while crown is snug
- You get hot spots on your forehead after long rides
Arai models with this shell:
Signet-X
Round Oval
Nearly equal front-to-back and side-to-side. The least common shape — but if you have it, IO helmets will never fit right.
You're likely this shape if:
- Helmets pinch at the temples
- Forehead and back-of-head feel loose
- You typically size up to relieve temple pressure (and end up with a sloppy fit)
Arai models with this shell:
Quantum-X
How to Tell Which Shape You Are ▾
The fastest way to identify your head shape is the pressure test — you don't need a tape measure or a mirror.
- Try on a properly-sized Intermediate Oval helmet (most modern helmets are IO — Shoei RF series, HJC RPHA, AGV Pista, Arai Corsair-X). Use the manufacturer's size chart based on your head circumference.
- Wear it for 5 minutes. Don't move it around. Just sit still and pay attention.
- Where do you feel pressure?
- Pressure on temples (sides of forehead) = you're Round Oval. Your head is wider relative to its length than IO helmets are built for.
- Pressure on forehead and back of head = you're Long Oval. Your head is longer front-to-back than IO helmets accommodate.
- Even, gentle pressure all around = you're Intermediate Oval. The IO shell fits you correctly.
Stop in to the shop and we'll do this with you on real Arai helmets — no guessing.
Dial In The Fit
Interchangeable Cheek Pads & Liners
Most helmets give you one interior. If your cheeks are pinched but your crown is loose, tough — buy a different size and hope. Arai doesn't work that way.
Every Arai uses a modular interior: cheek pads in 5mm thickness increments and a swappable crown liner. If your XL helmet's crown fits perfectly but the cheek pads pinch, you swap to thinner pads. If the helmet rotates on your head, you swap to thicker ones. Same shell, same size — different fit.
The Facial Contour System uses articulating cheek pads that wrap inward at the bottom to follow the natural shape of your jaw. It's why Arai owners almost universally describe their helmets as quieter than the competition — better seal, better fit, less wind noise.
The Arai Lineup
Premium hand-built helmets for sport, street, and touring riders.
Intermediate Oval
Corsair-X
Arai's flagship sport / track helmet. Super Complex Laminate Construction shell, R75 profile, oversized eyeport, and the VAS shield system used on MotoGP grids.
Shop Corsair-X →
Intermediate Oval
Regent-X
Comfort-focused street and sport-touring helmet. R75 shell with a quieter, more relaxed fit than the track-focused Corsair-X.
Shop Regent-X →
Intermediate Oval
Contour-X
The same R75 shell philosophy and PB-cLc construction at a more accessible price point. Quiet, comfortable, and unmistakably Arai.
Shop Contour-X →
Round Oval
Quantum-X
Built on Arai's Round Oval shell for riders whose Intermediate Oval helmets pinch at the temples. Same R75 safety profile, fitted to a wider head shape.
Shop Quantum-X →
Long Oval
Signet-X
Corsair-X-grade construction fitted to Arai's Long Oval shell. The right answer if Intermediate Oval helmets pinch your forehead.
Shop Signet-X →🛡️
Snell M2020
Certified to the highest motorcycle helmet impact standard in North America.
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DOT Approved
Meets and exceeds U.S. Department of Transportation FMVSS 218 requirements.
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MotoGP Proven
Worn on the world's fastest grids for decades. The same construction protects you on the street.
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5-Year Warranty
Five-year manufacturer warranty from date of purchase, plus a 7-year service life from production date.
Sleeve High Neck Bodycon Dress
$132.00
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