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GiroTyrant Spherical Helmet

Sale $119.96 - $159.95

Item # GIRZ31M

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  • Matte Black Hypnotic, M ($159.95)
  • Matte Black Hypnotic, S ($159.95)
  • Matte Citron, M ($119.98)
  • Matte Citron, S ($119.98)
  • Matte True Spruce, M ($119.96)
  • Matte True Spruce, S ($119.96)
  • Matte Black, L ($159.95)
  • Matte Black, M ($159.95)
  • Matte Black, S ($159.95)
  • Matte Portaro Grey, M ($159.95)
  • Matte Portaro Grey, S ($159.95)
  • Matte Trim Red, L ($159.95)
  • Matte Trim Red, M ($159.95)
  • Matte Trim Red, S ($159.95)
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Item # GIRZ31M

Why We Like The Tyrant MIPS Helmet

From backyard jump jams, to sessioning your favorite piece of singletrack, Giro's new Tyrant is designed to meet the needs of today's progressive trail riders. Though the style is reminiscent of old-school BMX helmets, it comes equipped with modern safety features like Spherical MIPS and progressive foam layering that handles both high- and low-speed impacts.

  • Open-face helmet with added coverage for rowdy trails
  • Two-piece shell brings durability without excess weight
  • MIPS Spherical redirects impact energy during a crash
  • EPS foam outer layer protects against high-speed impacts
  • Softer EPP inner layer takes care of low-speed impacts
  • 14 vents with internal channels to keep your head cool
  • Adjustable Roc Loc fit system enhances comfort and stability
  • Ages 5 and older

Tech Specs
Shell Materialin-mold polycarbonate
Ventilation14 vents with internal channeling, Stack Ventilation at brow line
Fit AdjustmentRoc Loc Air
Visoradjustable, tool-free bolt-on
CertificationsCPSC, CE EN1078
Manufacturer Warranty1 year


Adult Cycling Helmets
Super Fit™
Head Circumference

18.5 - 20in

(47 - 51cm)

20 - 21.75in

(51 - 55cm)

21.75 - 23.25in

(55 - 59cm)

23.25 - 24.75in

(59 - 63cm)

24 - 25.55in

(61 - 65cm)

Head Circumference

21.25 - 24in

(54 - 61cm)

19.75 - 22.5in

(50 - 57cm)

22.75 - 25.5in

(58 - 65cm)

How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

What do you think about this product?



How much does it weights?

>Rating: 5

The Only Helmet You'll Ever Need

I've used it several times
True to size
Size Bought

There is plenty of venting; its light enough, and the vented ear coverage on the sides should be on all helmets! The strap has a quick-click connection making it easy and simple to strap in. Visor is adjustable. The ear coverage does not interfere with hearing. This helmet is suitable for mountain biking, gravel roads and even road riding. I have been mountain biking for over 30 years, and until GIro reworked the Switchblade, I wore an old-school BMX over the ears solid helmet, and have never overheated.I still wear it when its cool or cold. The Tyrant is only the 2nd actual mtn biking helmet I have owned. Better coverage than the Fox Dropframe. Get this Helmet!