Fit systems wear out before helmets do. The dial can lose its click, the cradle can crack from repeated adjustment, or the whole assembly can take damage in a crash that leaves the shell intact. This Roc Loc 5 Air+ is the factory replacement for the Giro Aries Spherical helmet, and swapping it in restores the original fit and function without replacing the entire helmet.

The Air+ design uses Giro's patented suspended cradle that holds the helmet slightly off the top of your skull. This gap creates a channel for airflow to pass directly over your head, working in conjunction with the helmet's vents and internal channeling to move heat out. The result is noticeably better cooling than fit systems that sit flush against the scalp. The micro-adjustable dial at the rear lets you fine-tune tension with one hand while riding, and the system adjusts fore-aft tilt independently so you can position the helmet exactly where you want it without over-tightening the chin straps.

Fit system sizing matches helmet sizing, so order the same size as your Aries Spherical. The installation is straightforward and doesn't require tools. If your current Roc Loc still functions but you want a spare for travel or race day backup, this gives you a ready replacement without hunting for parts after something breaks. The system only fits the Aries Spherical and won't work with other Giro helmets that use different Roc Loc variants.