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GMax GM54S Derk Modular Helmet

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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 5 145 145
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
Not a bad helmet for your money I was pretty stoked when I bought this helmet. I have had modulars before but my latest was 3 years old and it was time for an upgrade. First thing I noticed was the look. Awesome. I ride a 2012 Yamaha Stryker, a cruising bike, so I get the odd glance when I ride up with a full face on. This one gets me looks because its straight awesome. I have only been able to wear it a few times because the snow wont leave North Dakota alone, but this is what I can tell you so far. The Good: -The vents are metallic grill inserts that really pop against the flat black I ordered. -The design offers a nice smooth cut through the wind. Pretty easy on the neck at 75mph and its easy to look over your shoulder for those pesky 4 wheels. -The padding is awesome. Makes you feel nice and secure without squeezing to tight. -Airflow is great. Vents work amazing and I haven't had an issue with overheating. Of course I haven't ridden in hot weather yet but so far so good. -Color options are basic but that flat black is NICE. -The helmet surprisingly fits just a bit big for all the padding. I used the measurement chart and I am active duty so I KNOW what size hat I wear but that being said its actually nice for me because I like to wear a head scarf (hey, 34 is cold at 6am) and it gives me a nice secure fit when I have it on. -I didn't notice it when I bought it online but this helmet has a freaking red LED light on the back. You push the button once, it lights up. You push it again, it flashes slow. One more push and it is a fast flash. Talk about awesome. Not to mention the "Safety Aspect" of visibility to anything behind you. But who really cares about that? Its a freaking LED light on the back of your helmet!! Come on! The Bad: -I ride with headphones in so I cant really speak for road noise but it does tend to get windy at times. -I haven't gotten used to the wind guard under the chin, especially when raising and lowering the face you have to tilt your head a bit. For the chilly North Dakota mornings its great, but its taking a bit of getting used to. -The visor tends to fog up on cold mornings. Could be the wind guard under the chin but for the good airflow it was unexpected. Also, the thumb grip to raise the visor is a bit small to work against the resistance of the mechanism. Again, the helmet is new so I hope it will smooth out with wear. -My last helmet had the modular release button just inside the bottom of the chin and you just had to push the button and raise. It was a natural motion. This helmet has a sliding latch on the front of the chin and you have to push up on it and then raise the face. Obviously it needs worked a bit to break in and get smooth but the motion seems unnatural. -Oh what I wouldn't give for a quick release helmet strap instead of having to buy one and install it myself! At least include one. OK, I am off my soap box. P.S. First order from Revzilla. Fantastic job guys! No issues, fast delivery, perfect shape. Will DEFINITELY make this my first stop from now on. April 7, 2015
Enjoying This Helmet I purchased this helmet because I am taking a road trip in June and wanted some extra protection since my Harley Sportster doesn't have a windshield. I love the modular aspect, since it gives me the openness that my Rogue helmet gives me. The smoked visor is really a nice feature for me because I wear glasses and I don't have to switch to sunglasses while riding. The visor fits great over my glasses with no issues. The venting is good. The fit is great! And the LED light in the back is a cool feature! Finally, the wine color is a very close match to the color of my Sportster! I ride everyday so it's nice to have a helmet that I can switch off to for a long road trip or for night riding! April 6, 2015
Very good features for this price All round excellent helmet. I really like the modular design as it makes have a quick conversation easier when you stop at lights. I chose this particular helmet because it was modular and also as it had the interior flip down tinted sun visor - a huge bonus. Do not mess with sun glasses - the inside sun visor is the only way to go. A few of my vent flaps have disappeared despite careful handling. Clear screen fogs up in the rain - can't seem to get that to stop. The helmet is comfortable for about the first 20 minutes and then I feel intense pressure/ pain on the top of my head. I tried the helmet before purchase, but this is just a reminder you need to walk around with the helmet on for 30 minutes or so to see if you have problems. If it wasn't for the head ache I would use this helmet more. However I now use it just for short trips or at night because it has the blinky red light in the back which is excellent. March 20, 2015
Great helmet for its price I actually thought it would be a bit more tough but then again it wouldn't be as light as it is. Overall, its a great helmet with no cons what so ever but it is a bit big for whenever i wear it people say i look like the stig in top gear so yeah its not that bad March 7, 2015
GREAT HELMET This helmet is freakin awesome!!! Modualr, plenty of ventilation,drop down eye shades and the LED light is a bonus, especially for all you night riders. 2 thumbs up. Thanks revzilla!!! February 23, 2015
This helmet has great features and highly functional This is my first helmet and I have used it for a year. I just had my first wreck and was thrown up in the air and landed directly on the modular release mechanism of the helmet. which split under impact. The sun visor scratched the bridge of my nose. I had a concussion. At 35mph with dense fog. This helmet saved my life I will by this exact helmet for life from now on. I chose this helmet from reading a similar review from another rider who crossed paths with a deer. I ride in the rain, snow and heat. This helmet has all the features to keep your head dry and cool or warm. You cant loose with this helmet. This helmet gives me the same satisfaction of safety as my Kevlar did in the Army. I attached pictures of the helmet after the damage was done and myself. Like I said only a scrambled brain from the blow and superficial cut from the inner lens coming down. I will recommend this helmet to everyone. Thank You GMAX and Revzilla December 29, 2014
Great helmet! Excellent product and excellent service from Revzilla. I already had one for myself so bought this for the wife. She really enjoys it as much as I. Enjoy the modular design. February 9, 2015
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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: 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)

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 Item # Manufacturer Product # Availability
Flat Black/Silver / 2XL 828109 NG1540398 F.TC-12 In Stock: Usually ships in 1-2 business days
Flat Black/Silver / 3XL 828110 NG1540399 F.TC-12 In Stock: Usually ships in 1-2 business days
Flat Black/Silver / LG 825560 NG1540396 F.TC-12 In Stock: Usually ships in 1-2 business days
Flat Black/Silver / MD 828105 NG1540395 F.TC-12 In Stock: Usually ships in 1-2 business days
Flat Black/Silver / SM 828106 NG1540394 F.TC-12 In Stock: Usually ships in 1-2 business days
Flat Black/Silver / XL 828107 NG1540397 F.TC-12 In Stock: Usually ships in 1-2 business days
Flat Black/Silver / XS 828108 NG1540393 F.TC-12 In Stock: Usually ships in 1-2 business days