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GMax GM54S Derk Modular Helmet

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GMax GM54S Derk Modular Helmet Videos

GMax GM54S Derk Modular Helmet 

The modular design 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.


  • 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
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GMax GM54S Derk Modular Helmet 4.4 5 111 111
second helmet Take it with a grain of salt as this is my second helmet I've ridden coming from a dissapointing hic IS modular. That said I love this thing all kinds +looks+feel++function+features+price 2 objections after about 2 weeks. -my friend easily broke a plastic vent cover thinking it lifted the modular face..(?) -the modular face started coming down without me touching it while walking. Upon inspection it looked like the holster screw was loosening over time ??!! That's safety so I had to shave a star for not having better. Longevity in mechanics.. Overall satisfied just take very good care of it. And pay attention to bolts. September 8, 2014
Good helmet Fits well and good value for the price. The features are good and the vents are of good quality. The shade switch is a little flimsy but works fine. Overall a good helmet August 25, 2014
This is not a motorcycle helmet This is a snow helmet. Visor is NOT shatter resistant and there's little doubt why people complain about it being noisy. September 12, 2014
Most bang for your buck Researched about 2 months, before I found this one. The videos helped alot. I bought an XXL. I used a measuring tape, and followed Revzilla's guidelines, and it fit perfect. It's tight around the cheeks. That's my only gripe. Really tight! There's some wind noise, but it's bearable. When riding without a helmet, or with my half shell, the fairing on my Road Glide pushes the wind right in my face. Took a ride with my helmet yesterday, and it was like night and day. I could actually hear the music from my stereo. Overall I'm glad I purchased this helmet. It was the most bang for my buck! September 2, 2014
Modular, Sun-Visor, Rear LED... 'Nuff Said! Great for the safety-conscious rider on a budget. When I started looking for helmets I didn't want to skimp on safety or features but I also didn't want to fork out a huge wad of cash. The features that sold me with this helmet were the modular design, sun-visor, and the light on the back. The helmet fits nicely on my head and although feels a bit on the heavier side (probably due to the modular features) it stays in place and doesn't jostle around. The neck strap does take an extra moment to put on but it's no biggie. The main visor is nice to reduce wind and noise and also prevent rocks and debris from hitting you in the face, but it can also glare a bit. Since I live in a warm climate, thus far I've only ridden with the main visor up. With the check pads in the noise level is quite muffled which can be both good and bad. In some cases you need noise reduction especially where there's heavy traffic but at the same time you may not always be able to notice vehicles. With the check pads removed the air-flow is better and the noise-reduction decreases slightly but it's still really good. Since this is my first helmet I really can't compare it to anything else, but a friend of mine who also rides says I made a great choice and he'd be hard pressed to find anything better in this price range. His only beef was that his personal preference is to stay away from modular and go with full faced helmets. Overall I am happy with this product and would recommend it to anyone who rides. September 1, 2014
Great Helmet This is a great helmet. The feature are outstanding for the price, like my other GMAX helmet. The sun shield is great and comes down far enough to completely cover line of vision, unlike some other helmet I have tried. The air flow to the top of my head is a noticeable improvement over my last helmet any with the chin mesh removed my face gets plenty of air. As always Revzilla was great with sending it and it even arrived a day earlier than expected. August 29, 2014
For the price a great helmet. There is a plastic piece inside the chin gard that has screws in it and at the time that I took the helmet out of the box when I recieved it in the mail one of the screws fell out. I did put back in without any issues, but quality control should have caught it before leaving the manufacturer. The plastic slides for the vent also feel a little cheap, but do vent air very well. Despite the little thing I really do like this helmet. At the time that I baught mine I also baught one for my wife who also very satisfied with the helmet. August 27, 2014
Great for Military, excellent features This is my first helmet so I have nothing to compare against for noise, air flow, vision and such. I will, however, focus on the features since this led me to purchasing the helmet: I commute to work at a military base and the gate guards require seeing your face when checking against your ID. The modular helmet allows easy flip up capability instead of removing a full-faced helmet, making the stop at the gate much shorter. I like the internal sun visor which allows quick switching from bright to dark conditions and not having to carry around sunglasses. The red LED in the back (with capability to sync with you brakes) is a useful feature too. I've used it in the "solid red" setting at night and I think it helped drivers be aware of me. The other settings are "flashing" (like what you might see on a bicyclist) and "rapid flashing" (I call it "epileptic flashing"). My reasons for purchasing: safety (features), functionality (for military bases), and price (<$200). August 26, 2014
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Have a functionality, fit, or otherwise product-specific question about the GMax GM54S Derk Modular Helmet ? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

GMax GM54S Derk Modular Helmet
Already Asked: 6 Questions, 21 Answers
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RevZilla Store asked: Why did you choose this?
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: 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)

Adult Helmet

SizeHat SizeMeasurement (in)
XS6 3/421 1/4 - 21 5/8
SM7 - 7 1/8
22 - 22 7/16
MD7 1/4 - 7 3/8
22 3/16 - 23 1/4
LG7 1/2 - 7 5/8
23 5/8 - 24
XL7 3/4 - 7 7/8
24 3/8 - 24 13/16
2XL8 - 8 1/8
25 3/16 - 25 5/8
3XL8 1/4 - 8 3/8
26 - 26 3/8

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 SKU ID Manufacturer Product # Availability
Flat Black/Silver / 2XL 828109 NG1540398 F.TC-12 In Stock: Ships within 24 hours
Flat Black/Silver / 3XL 828110 NG1540399 F.TC-12 In Stock: Ships within 24 hours
Flat Black/Silver / LG 825560 NG1540396 F.TC-12 In Stock: Ships within 24 hours
Flat Black/Silver / MD 828105 NG1540395 F.TC-12 In Stock: Ships within 24 hours
Flat Black/Silver / SM 828106 NG1540394 F.TC-12 In Stock: Ships within 24 hours
Flat Black/Silver / XL 828107 NG1540397 F.TC-12 In Stock: Ships within 24 hours
Flat Black/Silver / XS 828108 NG1540393 F.TC-12 In Stock: Ships within 24 hours