The tried-and-true "D-ring" attachment system is widely used, very reliable and is used on every racing helmet. All Snell helmets must be with D-ring buckle. Other "quick release" systems have been developed and provided convenience in easy-adjusting, but like trying to build a better mousetrap, none have improved on this basic attachment system.
A D-ring is infinitely adjustable and there are no springs to wear out or plastic and metal latches to break. All of the quick release mechanisms we've tried make it very hard to adjust the tightness of the helmet straps. Accessory quick release latches that are user installed should also be avoided, because they can add too much length to the helmet's strap, making it difficult to adjust correctly.
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