GMax GM55S Derk 2 Helmet with
Retractable Sun Shield.
GMAX leads the helmet industry with another innovative helmet, the 55 half
helmet with retractable sun shield, lightweight small shell design that sits
down on your head and GMAX industry leading "No Bull Venting Design" all for a
reasonable price!
- Retractable hard coated sun shield, changeable, simple no springs design
- Premium venting reduces heat at the top of the head. Comfort liner, shell and
styro designed for maximum venting without reducing the integrity of the helmet
- Coolmax performance materials and Chitosan anti-bacterial materials improve
comfort and safety
- Removable washable comfort liner
- GMAX premium fit for maximum comfort
- Included with removable snap in rear neck curtain for cool weather riding
- Premium soft materials used for padded chin strap covering
- Always do chin strap up securely
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 GM55S Derk 2 Helmet with Retractable Sun Shield
Rated 9
out of 10
based on 3 reviews
Comment: As an alternate to my full-face helmet, I was looking for something a little more open and airy. I found this Gmax helmet which includes the flip-down sun visor. Very nice for those glaring days out on the open road. The padded ear and neck attachment recently came in handy on a long trip that had lots of wind. This attachment worked great. Recommended buy!
Troy
Nebraska
Nice fit great helmet
Comment: Fast delivery. No problems with order, product was what I expected. Great for hot days when I was tempted to go without head protection. Built in visor is perfect
Diane
USA
Better Than Expected
Comment: The helmet fits well, rides well and looks good. I wear glasses and the sun screen works perfectly with them. I wear earplugs when I ride so the wind noise -- which is loud -- is tolerable. This is a fine warm weather helmet.
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