THOR Reflex Sport Carbon Stealth MIPS® Helmet
Features Shell constructed of carbon fiber, Spectra™, and fiberglass Adjustable peak (brim) MIPS® Integra TX comfort padding safety system headliner for reduced rotational forces transferred to the head Inner contoured... Read More
Features
- Shell constructed of carbon fiber, Spectra™, and fiberglass
- Adjustable peak (brim)
- MIPS® Integra TX comfort padding safety system headliner for reduced rotational forces transferred to the head
- Inner contoured cheek pads with quick release pull tabs
- Updated mouth vent system
- Dual density EPS impact liner with Koroyd® technology integration
- Sticker kit included
How to measure
Wrap a flexible tape measure around your head approximately one inch above the eyebrows and ears, and use that measurement to find your size. The helmet should fit the crown comfortably with no pressure points; cheekpads should fit firmly. With the chin strap fastened, moving the chin bar side to side should move your cheeks with the helmet — it should not slide across your face. Different-thickness cheekpads are available to tune fit; THOR stresses trying the helmet on to confirm.
Reflex Sport
| Size | Head circumference (cm) | Head circumference (inches) |
|---|---|---|
| XS | 53-54 | 20.9-21.3 |
| S | 55-56 | 21.7-22.0 |
| M | 57-58 | 22.4-22.8 |
| L | 58-59 | 22.8-23.2 |
| XL | 60-61 | 23.6-24.0 |
| 2XL | 62-63 | 24.4-24.8 |
Fleet
| Size | Head circumference (cm) | Head circumference (inches) |
|---|---|---|
| XS | 53-54 | 20.9-21.3 |
| S | 55-56 | 21.7-22.0 |
| M | 57-58 | 22.4-22.8 |
| L | 59-60 | 23.2-23.6 |
| XL | 61-62 | 24.0-24.4 |
| 2XL | 63-64 | 24.8-25.2 |
Youth sizes
| Size | Head circumference (cm) | Head circumference (inches) |
|---|---|---|
| YS | 48-49 | 18.9-19.3 |
| YM | 50-51 | 19.7-20.1 |
| YL | 52-53 | 20.5-20.9 |
Current official thormx.com fitment chart (extracted from THOR's own CMS data, last modified 2026-04-21). PER-MODEL sizing: Reflex Sport and Fleet share XS–M but diverge from L up (Reflex Sport L = 58-59 cm vs Fleet L = 59-60). Adult tops out at 2XL. Youth chart covers the Fleet Youth (published S/M/L → normalized YS/YM/YL). THOR publishes CM ONLY — all inch values here are converted (cm ÷ 2.54, 0.1" rounding), not manufacturer-printed. Legacy Sector and premium Reflex have no published row on the current chart — those models fit per packaging/dealer materials.
Manufacturer sizing data · verified July 13, 2026