Stilo ST6 FN Carbon Racing Helmet - FIA8860

Name: Stilo ST6 FN Carbon Racing Helmet - FIA8860
Brand: Stilo
Price: 3199.95 USD
Availability: InStock
Rating: 4.5 (4 reviews)

$3,199.95 USD

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Size 54 55 57 58 59 61 63 64

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Engineered for elite drivers, the Stilo ST6 FN Carbon FIA8860-2018 is a top-tier racing helmet combining FIA 8860-2018 safety certification with a lightweight carbon shell, customizable interior fit, and zero integrated electronics—ideal for pro motorsport teams using bespoke comms or hydration systems.

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Head measurements vary by brand. Measure the widest part of your head above the ears.

Size	Inches	CM	Hat Size
XS	20-7/8 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-5/8 - 22	55-56	6-7/8, 7
M	22-3/8 - 22-3/4	57-58	7-1/8, 7-1/4
L	23-1/4 - 23-5/8	59-60	7-3/8, 7-1/2
XL*	24 - 24-3/8	61-62	7-5/8, 7-3/4

Size	Inches	CM	Hat Size
XXS	21-1/2 - 21-5/8	54-55	6-3/4, 6-7/8
XS	22	56	7
S	22-3/8	57	7-1/8
M	22-3/4 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8	60	7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/4	63-64	7-7/8, 8
3XL	25-5/8 - 26	65-66	8-1/8, 8-1/4
4XL	26-3/8 - 26-3/4	67-68	8-3/8, 8-1/2

Size	Inches	CM	Hat Size
XXS	21-1/2 - 21-5/8	54-55	6-3/4, 6-7/8
XS	22	56	7
S	22-3/8	57	7-1/8
M	22-3/4 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8	60	7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/4	63-64	7-7/8, 8

Size	Inches	CM	Hat Size
XS	20-7/8 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-5/8 - 22	55-56	6-7/8, 7
M	22-3/8 - 22-3/4	57-58	7-1/8, 7-1/4
L	23-1/8 - 23-1/2	59-60	7-3/8, 7-1/2
XL	23-7/8 - 24-1/4	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/8	63-64	7-7/8, 8

Size	Inches	CM	Hat Size
XS	21-1/4 - 21-5/8	54-55	6-3/4, 6-7/8
S	22 - 22-1/2	56-57	7, 7-1/8
M	22-7/8 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8 - 24	60-61	7-1/2, 7-5/8
XL	24-3/8 - 24-3/4	62-63	7-3/4, 7-7/8
XXL	25-1/4 - 25-5/8	64-65	8, 8-1/8

Size	Inches	CM	Hat Size
XXS	21-1/2 - 21-5/8	54-55	6-3/4, 6-7/8
XS	22	56	7
S	22-3/8	57	7-1/8
M	22-3/4 - 23-1/4	58-59	7-1/4, 7-3/8
L	23-5/8	60	7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-3/4 - 25-1/4	63-64	7-7/8, 8

Size	Inches	CM	Hat Size
XXS	20 - 20-1/2	51-52	6-3/8, 6-1/2
XS	20-7/8 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-5/8 - 22-1/16	55-56	6-7/8, 7
M	22-7/16 - 22-7/8	57-58	7-1/8, 7-1/4
L	23-1/4 - 23-5/8	59-60	7-3/8, 7-1/2
XL	24 - 24-3/8	61-62	7-5/8, 7-3/4
XXL	24-13/16 - 25-3/16	63-64	7-7/8, 8
3XL	25-1/2+	65+	8-1/8

Size	CM	Hat Size
XS	54	6-3/4
S	56	7
M	59	7-3/8
L	60	7-1/2
XL	61	7-5/8
XXL	63	8

Size	Inches	CM	Hat Size
XS	21.25	54	6-3/4
S	21.65	55	6-7/8
M	22.45	57	7-1/8
L	22.8 - 23.25	58-59	7-1/4, 7-3/8
L+	23.6 - 24	60-61	7-1/2, 7-5/8
XL	24.4	62	7-3/4
XXL	24.8	63	7-7/8

Size	Inches	CM	Hat Size
XS	20-3/4 - 21-1/4	53-54	6-5/8, 6-3/4
S	21-1/2 - 21-7/8	55-56	6-7/8, 7
M	22-1/4 - 22-5/8	57-58	7-1/8, 7-1/4
M/L*	23 - 23-1/2	59-60	7-3/8, 7-1/2
L	23 - 23-1/2	59-60	7-3/8, 7-1/2
XL	23-7/8 - 24-1/4	61-62	7-5/8, 7-3/4

Actually Measuring Your Head

Use a soft measuring tape (craft store, like $3). Wrap it around the widest part of your dome, forehead to back, and get the same number twice. Use that number to pick your size. Revolutionary, we know. lol.

Guide to Buying a Racing Helmet

5 stars: 2 (50%)
4 stars: 2 (50%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Simple and well made

Nothing integrated means nothing to go wrong. The ST5 GT Zero does what I need and no more. FIA8860 accepted at all my events.

ST6 is a real step up from the ST5

The visor and profile changes are not just cosmetic. Better in the ways that matter for open-wheel driving. Worth the upgrade if you're replacing an ST5.

GT shell without the electronics complexity

Our team handles comms externally so the Zero version made sense. Lighter and simpler. FIA8860 cert and the eyeport suits my sedan well.

Better downward visibility than the ST5

You notice the improved field of view looking down toward the wheel and mirrors immediately. That matters in a formula car. Lighter shell too.