Stilo ST6 GT Zero Carbon Racing Helmet - FIA8860
Stilo ST6 GT Zero Carbon Racing Helmet - FIA8860
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The Stilo ST6 GT Zero Helmet is the lightest FIA 8860-2018 certified helmet available, engineered for top-tier GT and closed-cockpit racing. Constructed with an advanced high-tensile carbon shell, it meets the most stringent FIA safety requirements while pushing the limits of weight reduction. Designed for professional drivers, the GT Zero features integrated side ports for communication and hydration, along with a narrow eyeport for enhanced frontal impact protection. Its ultra-lightweight build minimizes neck fatigue over long stints, while aerodynamic refinement ensures stability at speed. When every gram counts, the ST6 GT Zero delivers world-class safety without compromise.
Size Guide
| Head size (cm) | Head size (in) | Stilo size | US hat size |
|---|---|---|---|
| 54 | 21 1/4 | 54 | 6 3/4 |
| 55 | 21 5/8 | 55 | 6 7/8 |
| 56 | 22 | 56 | 7 |
| 57 | 22 1/2 | 57 | 7 1/8 |
| 58 | 22 7/8 | 58 | 7 1/4 |
| 59 | 23 1/4 | 59 | 7 3/8 |
| 60 | 23 5/8 | 60 | 7 1/2 |
| 61 | 24 | 61 | 7 5/8 |
| 63 | 24 3/4 | 63 | 7 7/8 |
| 64 | 25 1/4 | 64 | 8 |
Stilo sizes are head circumference in centimetres — a size 57 helmet is built for a 57 cm head. Measure around the widest part of your head, about 1 cm above the eyebrows and above the ears.
Stilo run a little smaller than most other brands. If you fall between sizes, or measure a number Stilo does not make (53 and 62 are not produced), take the next size up and tighten the fit with cheek pads (20–35 mm) or crown and earmuff fitment pads.
Not every model offers every size: the ST5 range skips 56 and 58, the ST6 range skips 60, and the Venti Sport helmets are offered in 54, 55, 57, 59 and 61 only. Check the size selector on the product.
Shell sizes: ST5 and ST6 use a small shell for 54–59 and a large shell for 60–64.
Where dealers quote letter equivalents: 55 = S, 57 = M, 58 = M/L, 59 = L, 60 = L/XL, 61 = XL, 63 = XXL, 64 = XXXL. Stilo itself sizes only by number.
Sizing is from the manufacturer and varies between brands. Measure yourself and compare against the table rather than ordering your usual street size.