Arai Ram-X Helmet
Features Features intermediate oval shape which fits the majority of head shapes in the North American markets The Variable Axis System (VAS) pivot cover is smaller and lower, yielding more... Read More
Features
- Features intermediate oval shape which fits the majority of head shapes in the North American markets
- The Variable Axis System (VAS) pivot cover is smaller and lower, yielding more area above the cover and with a shell that is smoother along the Snell test line in the temple area, increasing the helmet's ability to glance off objects during an impact
- Features VAS-Z shield system, with a lower pivot point that allows the shell to be smoother in the temple area, improving the helmet's ability to slide more smoothly should it contact the ground or obstacles
- The lower pivot position is possible due to the dual-pivot assembly, creating the VAS, allowing the shield to function where a single pivot could not
- Features one-piece, multi-density EPS liner
- Z Resin combines several resins with different characteristics and bonds to the many layers and materials of the shell more securely using less resin, improving shell strength as well as reducing weight
- Pro Shade System adapts to many light conditions without sacrificing helmet impact absorption performance and allows air to pass through even at high speed
- Glasses Compatible — Removable foam in the top of the earcup allows the arms of glasses to easily slide into the helmet
- Earcups are easy to remove form the helmet and have removable covers for easy washing and access
- VAS-Z shield accepts VAS-Z Pinlock® lens
- Includes Pinlock®-120 fog resistant lens
How to measure
Measure the circumference of your head in cm across the forehead, above the eyes and ears and over the small bump at the back of the head — read the size where the tape joins. Focus on head size (crown fit) first, then fine-tune with cheek pads. Arai stresses the chart is a STARTING POINT: the best fit comes from trying on Arai's different interior fit shapes.
Arai Helmets size chart
| Size | Head circumference (cm) | Head circumference (inches) |
|---|---|---|
| XS | 53-54 | 20 7/8 - 21 1/4 |
| S | 55-56 | 21 5/8 - 22 |
| M | 57-58 | 22 1/2 - 22 7/8 |
| L | 59-60 | 23 1/4 - 23 5/8 |
| XL | 61-62 | 24 - 24 3/8 |
| 2XL | 63-64 | 24 3/4 - 25 1/4 |
| 3XL | 65-66 | 25 5/8 - 26 |
One head-circumference chart covers all current Arai models — what differs per model is interior SHAPE, not size: Intermediate Oval (Corsair-X, Contour-X, Defiant-X, Regent-X, XD-4/XD-5, VX-Pro4 — fits most North American heads), Round Oval (Quantum-X), Long Oval (Signet-X). Try the shape that matches your head. Not every model runs every size (e.g. Corsair-X standard range XS–2XL). Arai publishes CM ONLY on every official arm — inch values here are exact conversions (×2.54, nearest 1/8″), not manufacturer-printed; retailer inch charts differ because they round differently. Labels normalized (XXL/XXXL → 2XL/3XL). Extreme sizes (3XS 49-50, 2XS 51-52) are select-model/special-order and not on the current chart. No youth motorcycle chart exists (the CK-6 is a karting helmet). Verified from araiamericas.com chart image + whyarai.co.uk 2026-07-13.
Manufacturer sizing data · verified July 13, 2026