Stilo ST6 GT Composite Racing Helmet - SA2020 / FIA8859
Stilo ST6 GT Composite Racing Helmet - SA2020 / FIA8859
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The Stilo ST6 GT Composite Helmet offers the performance-driven design of Stilo’s top-tier models in a durable and cost-effective composite shell. Certified to both SA2020 and FIA 8859-2015 standards, it provides professional-grade protection for serious drivers across club and endurance racing. The GT configuration includes integrated side ports for radio communication and hydration systems, making it race-ready right out of the box. Its aerodynamic shape, narrow eyeport for enhanced frontal protection, and fire-retardant interior deliver exceptional comfort and safety. The ST6 GT Composite is the ideal solution for racers seeking Stilo quality without the premium carbon fiber price.
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.