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The only issue I’ve encountered so far is with wearing certain sunglasses, since the fit is pretty tight on either side of the head with the Tyrant. Longer armed glasses tend to foul on the inside of the shell and the harness, though this will vary from head to head and glasses brand to brand.
The P. O. V. Plus Visor has an adjustment mechanism that allows the visor to be adjusted up and down in 3 steps. In addition, the visor can be pushed up so far that the goggle can be pushed onto the helmet during a break, for example. The adjustment is easy to make with one hand and while driving. Why the dual-shell design? According to Giro, the harder EPS outer shell is a better material for harder, high-speed impacts. In comparison, the EPP foam shell is softer and has a slower rebound characteristic, which takes care of slow-speed impacts. The softer EPP shell is the one that sits closest to your head, which is really what you want from a safety perspective.DH allows cool airflow to pass directly over your head, further enhancing the performance of vents and internal Giro is offering the Tyrant in three sizes: Small (51-55cm), Medium (55-59cm), and Large (59-63cm). Being a Medium in basically every helmet brand, that’s what I went for with the Tyrant. I found the sizing to be pretty similar to my favourite convertible helmet, the Bell Super DH, which isn’t surprising given that Bell and Giro are owned by the same parent company. Overall, the shape isn’t unlike Giro’s Switchblade helmet with the chin bar removed. The Switchblade isn’t well known for being a light or breezy helmet though, so Giro have gone to some lengths to chisel off the grams and give the Tyrant decent ventilation. There are 14 vents in total, which includes the two horizontal vents over the ear-holes to prevent you from steaming up too much. Two different materials are used to manage impact energy: One layer is EPS which is well-suited to high-speed STYLE OVER SPEED. DESIGNED TO MEET THE NEEDS OF TODAY’S PROGRESSIVE TRAIL RIDERS, THE TYRANT MIPS® HELMET HAS ATTITUDE AND INNOVATIONS THAT USHER IN THE MODERN ERA OF PROGRESSIVE MOUNTAIN BIKING.
and stability. Using a patented design that suspends the helmet just slightly off the top of the skull, Roc Loc® AirAs part of a new wave of moto-inspired, open-face trail helmets, the Giro Tyrant Spherical provides significantly more head coverage than most of the standard mountain bike helmets we tested. Giro bills this beefy lid as a versatile option that can span the gap between gravity, trail, and dirt jump helmets. After weeks of rigorous testing, we support Giro's claim that it's an incredibly versatile helmet despite its heavy, protective construction. The first thing you'll notice when donning the Tyrant is that it shares a unique dual-shell construction with its half-shell counterpart, the Manifest. The inner shell is low-density EPP foam for minor impacts, and the outer shell is high-density EPS to absorb major collisions. Despite its double-shell composition, the helmet keeps a relatively low profile on your head, and the vents do a surprisingly good job of keeping things cool. Combine the innovative protection and coverage with Giro's Roc Loc harness system and refined shell shape, and you have a helmet that stays comfortable all day.