- New inner flip tint sun lens.
- Inner flip shield is easily raised of lowered with a lever located on the
exterior of the helmet.
- Distortion free clear single lens shield.
- New integrated multi-function red L.E.D rear light.
- Optional rear brake light kit available.
- One hand easy to use chin bar push to open mechanism.
- Lightweight D.O.T approved thermo-plastic alloy shell.
- Excellent shield sealing reduces unwanted air and noise.
- GMAX "D.E.V.S" adjustable "dual exhaust venting system",top, side, and rear
venting reduces fogging and sweating by allowing hot air to escape from the
mouth area and top of head.
- Adjustable chin vent directs air upward across the inside of the shield to help
reduce or eliminate fogging.
- Large eye port for improved range of vision.
- Coolmax comfort liner and cheek pads move the moisture away from your body and
the fabric dries quickly. The added performance keeps you dry and comfortable.
- Removable/washable interior and adjustable cheek pads allow for more
comfortable sizing.
- Deluxe ear pockets for better fit and comfort.
- Built in speaker pockets for communication systems.
- Soft padded chin strap.
- Painted shell with high quality clear coat finish.
- Soft helmet bag included.
GMax Helmet Size Chart:
Helmet Sizing Information. We ask that you use the following information to
help choose the proper size helmet. In order for a helmet to protect properly
and be the most comfortable, it must be size to your head correctly.
To find the Correct size helmet for a person's head:
(1) Measure the head circumference one-inch above the eyebrows and ears
(2) Using the circumference measured, use the size chart below to find the
approximate size
(3) Once you have tried on the helmet it should fell snug equally around the
head. The helmet should not feel too tight or too loose at any point around
head.
*** Please remember that all head shapes vary slightly and that this sizing
chart is to be used as a starting guide, not an exact guide.
SIZE CHART
CIRCUMFERENCE
HELMET SIZE
Metric cm
Inches
Letter
Number
53
- 54cm
21-1/4" - 21-5/8"
XS
6-3/4 - 6-7/8
55
- 56cm
22"
- 22-7/16"
S
7 -
7-1/8
57
- 58cm
22-13/16" - 23-1/4"
M
7-1/4 - 7-3/8
59
- 60cm
23-5/8" - 24"
L
7-1/2 - 7-5/8
61
- 62cm
24-3/8" - 24-13/16"
XL
7-3/4 - 7-7/8
63
- 64cm
25-3/16" - 25-5/8"
XXL
8 -
8-1/8
65
- 66cm
26"
- 26-3/8"
XXXL
8-1/4 - 8-3/8
67
- 68cm
26-1/2" - 26-5/8"
XXXXL
Customer Reviews
GMax GM54S Derk Modular Helmet
Rated 9
out of 10
based on 1 reviews
Comment: Got 1, ordering another for a passenger. Fits great works good. Love the sun shade. Opens easily with one hand. Finding vents takes some getting use to.
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