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GMax GM54S Derk Helmet

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GMax GM54S Derk Helmet Videos

GMax GM54S Derk Modular Helmet 

The modular design of the GMax GM54 allows the flip-jaw to rotate further back on the crown of the helmet. The further rotation of the flip-jaw not only increases the user's line-of-sight when in the raised position, but it also lessens the user's fatigue by maintaining an even distribution of weight across the helmet.


  • Inner flip sun shield is easily raised of lowered with a lever located on the exterior of the helmet
  • Distortion-free clear single lens face shield
  • Integrated multi-function red LED rear light
  • One hand, easy to use chin bar push-to-open mechanism
  • Lightweight thermo-plastic alloy shell
  • Excellent shield sealing reduces unwanted air and noise
  • D.E.V.S 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
  • Removable and 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
  • Optional rear brake light kit (sold separately)
Write a Product Review for a chance to win our monthly $100 giveaways.
GMax GM54S Derk Helmet 4.4 5 157 157
I like very much my helmet Hi, I live in Venezuela, I bought this helmet and the only cons i found is a little heavy than i was get used. I was driving in rain and the light behind was very usefull. The air flow is very convenient for the hot weather of my country. This web site was very, very excelent to help me to choice that helmet, the reviews and the videos are excellents. The shipping time is fine. My congratulations to the people of Revzilla. Very happy i am with my helmet. I will buy another one for my wife. Sorry my english. Hola, vivo en Venezuela, la unica desventaja que consigo al casco es que es un poco pesado para lo que estoy acostumbrado. Con respecto a flujo de aire, es excelente para clima tropical. Estoy muy feliz con el casco. Voy a comprar otro igual para mi esposa. Excelente sitio web, me ayudó mucho para escoger el casco que quería. Felicidades Revzilla, sus videos son excelentes, sigan con el buen trabajo. July 28, 2015
Two broken sliders Caution: I have gone through two of these. I took each out of the box and then worked the slider to lower the inner visor...both SHEARED off after working the mechanism 2-3 times. (the helmet was still usuable, as was the inner shield, I just would have had to sling my head downwards to have the inner shield come out a bit, then pull it down etc...) So look out for that if you purchase one. The light was a nice feature. July 20, 2015
Cool helmet with great features Fits a little wide. My only complaint is that some parts feel a little flimsy. The shade mechanism is made of flexible plastic and I wonder how easy it would be to break. The Modular aspect is wonderful! When the face plate is up or down, the helmet is balanced perfectly, "maintaining an even distribution of weight across the helmet". Very comfortable. mine was a little too large and wide. May 27, 2015
First helmet This is my first helmet, and I am thoroughly impressed. When I compare the features of this helmet to some of my friends' much more expensive helmets, they are jealous to learn how much I paid for what I got. I am also a daily commuter, so the flashing light really helps increase my visibility since a part of my commute is in the dark, unlit, desert areas of California. July 7, 2015
Great helmet for the price (It's safe too!) First of all, this helmet has great featues for the price. There are down sides to this helmet. It is loud and it is a bit heavy but all in all a great value. Now, here is testimonial you rarely get in reviews like this... I will tell you that this helmet will hold up in a crash and hold up well. I had to retire it this past weekend when someone pulled out in front of me. I was moving at about 40mph and had to panic stop. The front locked up and I tried to recover but could not. Luckily was tossed somewhere between high and low side instead of hitting their car broad side. I hit head first on the left side of the face guard and then slid on my left side for about 20 feet. There are deep scratches but it protected me from impact and from losing my face on the blacktop. I was worried about how a modualr helmet would hold up in a crash. This was not a high speed accident but something you could expect on surface streets and I walked away with only minor road rash on my left knee and some sore muscles.....If you want a good helmet at an affordable price...this is your helmet. May 12, 2015
The GMAx is serious value for the money. I like this helmet, so much that I bought another as a spare. Like a KLR650 it might not do anything very well but it does everything! PROS: An excellent fit for an XL with a long oval shape (better than my Schuberth C3), inexpensive shields which don't scratch easily (unlike the C3's $$$ butter lenses), good airflow and a plush lining. Noisier than full face but very acceptable. Blinking light in the back of the helmet is actually very visible according to the riding buddies. Cons: D-ring chin strap (a ratcheting one would be nice) and a chin bar release button that's difficult to use without the shield open... 'fixed' on both of mine with a small blob of 'Sugru' formed into a shape that allows my thumb and forefinger to be used with shield closed. June 15, 2015
Great Helmet Inexpensive yet made with quality materials. Bought this helmet for my wife and she loves it. May 29, 2015
First helmet purchase As a new rider, I was looking for a good value purchase. Here are my impressions after 2-1/2 years of use. This helmet is LOUD and HEAVY. I have had to use the Blue Hearos Ear Plugs - Xtreme Protection Series, and I still think the wind noise it too much. There is not much else I know what to do about it except buy a better helmet next time. Also, the slider on top, for the tinted inside visor, broke after about a year of use. So I am forced to "nod" my head downward quickly to get the visor to move down enough to grab it with my fingers. Otherwise, I like the design. But like I said, because of the weight and noise, I will upgrade next time. April 13, 2015
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Have a functionality, fit, or otherwise product-specific question about the GMax GM54S Derk Helmet ? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

GMax GM54S Derk Helmet
Already Asked: 7 Questions, 27 Answers
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RevZilla Store asked: Why did you choose this?
GUIDO J: the look of the helmet Apr 23, 2015
Ryan S: I knew I wanted a modular helmet. This one had a great price for the options I was looking for: built-in sun shades, modular capabilities, and cool style.
The back light is what really sold it for me though. 3-styles: always on, blinking slowly, blinking quickly. Safety first!
Dec 4, 2014
Kam E: HJC IS MAX BT unimpressed me... -_-
-price(first helmet)
-Lots of vents (desert)
-Back light (night time visibility)
Aug 19, 2014
Faran R: I already have a full face helmet and I wanted a modular for street riding and just get lazy at times with a face full.
After ready reviews from many different websites on sub $200 helmets this seemed to have received the most positive feed back.
Hopefully it doesn't disappoint. Gmax does seem to carry really comfortable helmets for the price.
Aug 7, 2014
Michael E: Had the features I desired. Jun 30, 2014
Stephen N: Needed a good helmet on a budget. This helmet had amazing reviews and comes with great features. Jun 25, 2014
Kevin H: safety conscious older biker Jun 12, 2014
Roberto B: I Have the Non-Modular version of this helmet, and like the style and the rear light. The modular feature makes it easier to talk without removing the helmet. May 2, 2014
Gary W: Like brand and apperance Mar 27, 2014
Andrew N: I picked this helmet because I had seen it in a shop where I live and had a chance to try it on and test out the modular features its has. The helmet feels very solid and provides good air flow when your riding. It also comes in an XS and that is very much appreciated as I have had a very hard time finding a helmet that will fit correctly and do what I want it to. Mar 24, 2014
brent b: I like the look of this one and it had much better reviews than the cheaper helmets I looked at as well as some of the more expensive ones. I had 200 dollars as my self inflicted limit. I wanted a bluetooth but it looks as though anything under 450 isn't worth buying as a single unit. Mar 22, 2014
Rhea s: This is a great helmet and I love it so much. Sep 24, 2013
Chris B: I went with this helmet because of the features and the price. I was originally looking at the regular 54s, but then I saw this styling and really liked it. Sep 8, 2013
Phillip M: Great fit and nice graphic design. Sep 5, 2013
A shopper asked: I have a full face helmet but wear glasses. I was interested in this helmet bc it was recommended by another Vstar owner. I like the brake light ability and the modular aspect.

Will the face close if I'm wearing my glasses or do I have to take them off, close the helmet, then slip them in through my visor like my full face one?

I like the communication pockets in the ears. How does that work or do you need other items?

Dec 15, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Travon M: As far as the glasses go, you can slide the helmet on A LOT easier with the face open, and yes it will close with no problem. Another awesome thing about this is the inner shaded visor that slides down from the top so you do not have to worry about shades or buying an additional dark visor (this also gives you good distance from glasses to inner visor). I tend to put this helmet on with my glasses already on, close the face, drop the inner visor and ride out. As far as the communication pocket goes, I used a wired Bluetooth (earbuds with mic towards the bottom of the cord) which seemed to fit good, however; with the mic below the front of the helmet, I got a lot of wind gushing in to the mic so no one could understand me. I'm sure if the mic was attached to the ear itself,
It would sound a lot better. Overall, this helmet has good ventilation, great comfort, and to me is a must for glasses.
Dec 15, 2014
Reply to Travon Good answer? Yes (0) No (0)
Chad S: Don't use the communication piece but if I wear glasses I put them on with the face open. Not through the visor. I think you need glasses that are thin and hug your head though. I have a certain pair with thin ear pieces. My Oakley eye glasses are too wide (rounded) off my head and I would be afraid of bending them in under the tight foam. The light is just flashing. Doesn't really do anything with breaks that I know of. Dec 15, 2014
Reply to Chad Good answer? Yes (0) No (0)
Isaak R: The face is able to close even with glasses on. The ear pockets do require an aftermarket communications set, the helmet does not come with a radio or bluetooth headset. Dec 15, 2014
Reply to Isaak Good answer? Yes (0) No (0)
David S: I were glasses all the time with this helmet. It opens and closes just fine with glasses on. Dec 15, 2014
Reply to David Good answer? Yes (0) No (0)
A shopper asked: Will eyeglasses fit in through the helmet? Feb 3, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
RevZilla: This helmet is not designed to accommodate eyeglasses, but they will fit (with some difficulty however). Feb 5, 2013
Reply to RevZilla Good answer? Yes (0) No (0)

GMax Helmet Sizing:

Size Head Measurement (cm)
XS 53 - 54
SM 55 - 56
MD 57 - 58
LG 59 - 60
XL 61 - 62
2XL 63 - 64
3XL 65 - 66
4XL 67 - 68

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full GMAX Helmets Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Flat Black/Silver / 2XL 828109 NG1540398 F.TC-12 In Stock: Ships next business day
Flat Black/Silver / 3XL 828110 NG1540399 F.TC-12 In Stock: Ships next business day
Flat Black/Silver / LG 825560 NG1540396 F.TC-12 In Stock: Ships next business day
Flat Black/Silver / MD 828105 NG1540395 F.TC-12 In Stock: Ships next business day
Flat Black/Silver / SM 828106 NG1540394 F.TC-12 In Stock: Ships next business day
Flat Black/Silver / XL 828107 NG1540397 F.TC-12 In Stock: Ships next business day
Flat Black/Silver / XS 828108 NG1540393 F.TC-12 In Stock: Ships next business day