What does RD-4C mean on a Bell helmet?
Bell GT6 PRO Racing Helmet - Snell SA2025/FIA8859
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Open Sep 23, 2026 - 01:47 PM
Design, Style & Accessories
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Staff Answer
Sep 23, 2026 - 01:47 PM
RD-4C identifies Bell's integrated radio and hydration solution, featuring a 4-pin IMSA connector. For the GT6 PRO and Ultra Carbon helmets, it adds a factory-installed radio kit, drink tube attachment, and IMSA-compatible coil cord, enhancing the base helmet for closed-cockpit racing applications.
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Bell GT6 PRO Racing Helmet - Snell SA2025/FIA8859
Overview Application In The Box The Bell GT6 PRO Racing Helmet is engineered specifically for closed-cockpit racing environments with a modern, aggressive design that prioritizes enhanced visibility, lightweight performance, and customizable ventilation. This premium Bell helmet, part of the PRO Ser...
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