The Arai SK6 and Arai GP7 are both high-performance helmets from Arai, but they are designed for different purposes: the SK6 specifically for karting and the GP7 for car racing. Besides the GP7's flame-retardant lining (which is not relevant for karting), there are some key differences. I investigated this based on information from Arai and user experiences.
Differences between Arai SK6 and GP7
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Design and fit :
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The SK6 is specifically designed for the karting position. The helmet offers a slightly different viewing angle, adapted to the lower and more forward-leaning posture of a karter. This can improve visibility while driving.
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The GP7 is optimized for car racing, where the riding position is more upright. Users also report that the fit varies: the SK6 has a different interior shape that can be more comfortable for some head shapes. For example, one Reddit user noted that the GP7 caused pressure points on the head, while the SK6 was comfortable all day long.
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Ventilation system :
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The SK6 has a ventilation system tailored to the needs of karting, where you are more open to the elements and airflow is crucial.
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The GP7 features a more advanced ventilation system, with three larger, closable intakes on top, four exhaust vents at the rear, and a redesigned chin bar for improved airflow and aerodynamics. This is more suitable for the high-speed, closed-cockpit conditions of car racing.
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Weight and comfort :
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The SK6 uses a Complex Laminate Construction (cLc) shell, making it light and strong, with a soft EPS liner for added comfort.
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The GP7 features a Peripherally Belted Complex Laminate (PBcLc) shell, which is even more advanced and specifically derived from Arai's F1 helmets. While both helmets are lightweight, the SK6 may feel slightly more comfortable for extended karting use due to its softer lining and fit.
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Additional features on the GP7 :
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The GP7 has HANS clips (for Head and Neck Support), which is mandatory in many motorsport classes, but not relevant for karting.
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The GP7 has an improved visor system with a lower pivot point (Variable Axis System), allowing the visor to open wider and offering better protection. The SK6 has a simpler visor system, but it's sufficient for karting.
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Certifications :
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The SK6 is Snell K2020 certified, specifically for karting.
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The GP7 meets stricter motorsport standards such as Snell SA2020 and FIA8859-2015, which makes it suitable for car racing, but is overkill for karting.
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Conclusion Arai helmets
The Arai SK6 is better suited to karting thanks to its adjusted viewing angle, comfortable fit, and ventilation suitable for outdoor racing. The GP7 is more advanced with features like HANS clips and an improved visor system, but these are more focused on car racing. User experiences indicate that the SK6 is often more comfortable for prolonged karting use, while the GP7 can sometimes cause pressure points due to its different interior shape. If you're specifically choosing karting, the SK6 is probably the better choice.
