Giro Tyrant Spherical MTB Helmet

MBR Editors Choice Award 2019
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.
THE TYRANT MIPS® HELMET IS DESIGNED TO MEET THE NEEDS OF TODAYS PROGRESSIVE TRAIL RIDERS. EQUALLY AT HOME ON FOREST SINGLETRACK AS IT IS AT THE DIRT JUMPS, TYRANTS ATTITUDE USHERS IN THE MODERN ERA OF MOUNTAIN BIKING.
While the style is understated, the Tyrant boasts countless under-the-hood tech breakthroughs including Wind Tunnel Ventilation and MIPS Spherical technology. MIPS Spherical utilizes a pair of foam layers that work like a ball and socket to redirect impact energy in a crash. One layer is EPS, which is well suited to high-speed crashes. The other is a lower density EPP foam with rebound characteristics to address low-speed, roll-around-in-the-dirt-type spills. The added coverage of this full cut design further enhances protective capability, while taking helmet design in a new direction for riders seeking style over speed.
VENTILATION - CHANNELED STACK VENTILATION AT BROW LINE 14 VENTS WITH INTERNAL CHANNELING SUPER FIT
CONSTRUCTION - HARDSHELL WITH IN-MOLD POLYCARBONATE HARDBODY LOWER WRAP PROGRESSIVE LAYERING WITH EPS OUTER LINER AND EPP INNER LINER
FIT SYSTEM - ROC LOC® AIR
Occasionally, without notice, manufacturers change product design and/or specifications.

Giro Helmet Size Guide
How to measure your head size
To find the circumference of your head, place a tape measure in the centre of your forehead, wrap it around above your ears and around the back of your head. If there's a slight difference between two different sizes, always go for the tighter size.

Giro cycling helmets are adjustable so will fit a range of head sizes. Once you know the circumference of your head, select an appropriate helmet size. For example, if your measurement is 57cm then a size M (55-59cm) or a One Size (54-61cm) will fit you.
Giro Men’s or Unisex Helmet Size Chart
Helmet Size |
Head Circumference cm |
One Size |
54 – 61 |
Small |
51 – 56 |
Medium |
55 – 59 |
Large |
59 - 63 |
Extra Large (selected models) |
61 - 65 |
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