GMAX sets new open face helmet standards with the 17 SPC helmet
Hard coated shields reduce scratching
Easily removable aerodynamic flush mounted screwless shield
Industry leading eight vents, including new GMAX top vents and rear vents with premium SPC vented styro and interior engineered for maximum air flow control
Removable, adjustable, Coolmax interior and cheek pads for premium comfort and GMAX superior fit
Industry leader Coolmax interior fabric moves moisture away from your skin, fabric dries quickly keeping you cool and comfortable
Speaker pockets for easy speaker installation
State of the art engineered lightweight thermo-plastic poly alloy shell and D.O.T. Approved. Helmets that have been worn are non-returnable due to health and safety concerns.
| Helmet Size |
Metric |
Inches |
Hat Size |
| Youth/S |
50 cm |
19-11/16 |
6-1/4 |
| Youth/S |
51 cm |
20-1/16 |
6-3/8 |
| Youth Small/Medium |
50 cm |
19-11/16 |
6-1/4 |
| Youth Small/Medium |
51 cm |
20-1/16 |
6-3/8 |
| Youth/M |
52 cm |
20-7/16 |
6-1/2 |
| Youth/M |
53 cm |
20-7/8 |
6-5/8 |
| Youth Large/XLarge |
52 cm |
20-7/16 |
6-1/2 |
| Youth Large/XLarge |
53 cm |
20-7/8 |
6-5/8 |
| Youth/L |
53.5 cm |
21 |
6-11/16 |
| XS |
54 cm |
21-1/4 |
6-3/4 |
| XS |
55 cm |
21-5/8 |
6-3/4 |
| S |
56 cm |
22 |
7 |
| S |
57 cm |
22-7/16 |
7-1/8 |
| M |
58 cm |
22-13/16 |
7-1/4 |
| M |
59 cm |
23-1/4 |
7-3/8 |
| L |
60 cm |
23-5/8 |
7-1/2 |
| L |
61 cm |
24 |
7-5/8 |
| XL |
62 cm |
24-3/8 |
7-3/4 |
| XL |
63 cm |
24-13/16 |
7-7/8 |
| XXL |
64 cm |
25-3/16 |
8 |
| XXL |
65 cm |
25-5/8 |
8-1/8 |
| XXXL |
66 cm |
26 |
8-1/4 |
| XXXL |
67 cm |
26-3/8 |
8-3/8 |
Sizing is provided by the manufacturer and does not guarantee a perfect fit.
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