Arai Regent-X Patch Helmet
Features Quick, easy, and intuitive, the Variable Axis System (VAS) shield mechanism was developed to enhance the shape of the shell Smooth shell along the Snell test line in the... Read More
Features
- Quick, easy, and intuitive, the Variable Axis System (VAS) shield mechanism was developed to enhance the shape of the shell
- Smooth shell along the Snell test line in the temple area increases the helmet's ability to glance off objects during an impact
- Features intermediate oval shape which fits the majority of head shapes in the North American markets
- The VAS latch captures and securely holds the shield closed to help prevent unexpected opening
- VAS pivot cover is smaller and lower, yielding more area above the cover
- Peripherally Belted Complex Laminate Construction (PB-CLC) shell is developed to be both light and stronger
- Larger latch allows for intuitive and seamless shield operation
- Adjustable perimeter liner and cheek pads allow owners to custom fit to their exact size requirement
- FCS® Cheek Pads — The contoured shape — combined with multiple layers of varying foam densities supported by a foam “spring” — cradles the face and helps block wind noise
- One-piece exhaust vent improves exhaust performance and aerodynamic stability
- Soft-brushed, removable liner allows for easy cleaning and provides incredible comfort
- Top exhaust vent remains open at all times, assisting with extraction of heat and aiding in relief of moisture build-up in the eye port area that can cause shield fogging
- Shell flares 5 mm around the base, making it easier to get the helmet on and off yet remains secure with the FCS2 cheek pads
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