GM-11S Electric Shield Helmet
This GMAX® dual sport helmet is truly an all purpose helmet. With the ability to convert to a visor-less configuration and accept goggles while still having the shield down. The... Read More
This GMAX® dual sport helmet is truly an all purpose helmet. With the ability to convert to a visor-less configuration and accept goggles while still having the shield down. The GM-11S helmet is loaded with features and designs normally found on other high priced helmets, but delivered to you at a true GMAX® competitive value.
Features
- DOT Approved
- Helmet can be quickly converted from a visor configuration to a visor-less configuration
- Helmet includes electric shield with cord kit, cold weather breath box and chin curtain
- Shield is completely hidden under the visor and out of line-of-sight, when fully raised
- Large eye port that accepts even the largest goggles
- Shield can be fully raised or lowered when using goggles
- COOLMAX® removable and washable interior
- Speaker pockets for communication systems
How to measure
Measure the circumference of your head one inch above the eyebrows and across the largest portion of the back of the head, then find the matching range. The crown should apply snug, even pressure and cheek pads should be snug (they break in with use). If the helmet moves on your head it is too loose; if it causes pain it is too small. If between sizes, size down.
GMAX size chart
| Size | Head circumference (cm) | Head circumference (inches) |
|---|---|---|
| YL / XS | 53-54 | 20 7/8 - 21 1/4 |
| S | 55-56 | 21 5/8 - 22 |
| M | 57-58 | 22 7/16 - 22 13/16 |
| L | 59-60 | 23 1/4 - 23 5/8 |
| XL | 61-62 | 24 - 24 3/8 |
| 2XL | 63-64 | 24 13/16 - 25 |
| 3XL | 65-66 | 25 5/8 - 26 |
| 4XL | 67-68 | 26 3/8 - 26 3/4 |
Youth sizes
| Size | Head circumference (cm) | Head circumference (inches) |
|---|---|---|
| YS | 49-50 | 19 5/16 - 19 11/16 |
| YM (= XXS) | 51-52 | 20 1/16 - 20 7/16 |
| YL (= XS) | 53-54 | 20 7/8 - 21 1/4 |
One universal GMAX chart covers the whole lineup (street, dual-sport, snow). Youth and adult small sizes share shells and are dual-labeled: a Youth Large is the same fit as an adult XS.
Manufacturer sizing data · verified July 8, 2026