Log In / Register
Cart (0) Checkout
GMax GM54S Derk Modular Helmet

Please select a Size to check availability, or to add this item to your Shopping Cart or Wish List.


Select Size:

Size Chart
Select qty:
Your Savings (25%):
Your Price
Please select a Size to view availability.

Related Videos (2)

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
Write a Product Review for a chance to win our monthly $100 giveaways.
GMax GM54S Derk Modular Helmet 4.4 5 140 140
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
Absolutely perfect except one thing I absolutely love this helmet. The light helps a lot at night (not so much during the day), and it is obviously really cool looking. It's super comfortable and easy to put on without ruining my hair (big bonus) mostly because of the modular capabilities. Absolutely love it. One thing is that the inside visor fogs up heavily from my breathe and I'm not sure if I'm doing something wrong or there's a mouthpiece I lost somewhere in the packaging. Cracking open the visor a tiny big helps fix the problem but I feel like that shouldn't be a problem in the first place. Also the decal is peeling a tiny bit (not one that can spiral out of control) around just above where the modular screws are. It isn't noticeable unless you're looking closely at it though so no big deal. December 15, 2014
Excellant choice for a modulare helment This is the second modular helmet I have owned. I find this much more comfortable than my previous helmet plus the integrated sun shield is a really great feature. While the helmet may be a little heavier it isn't really noticeable. The vents work well. January 12, 2015
ALMOST MADE A GREAT HELMET The helmet, with all the multifunctonality, would have been great and a bang for the buck. i've been riding with it for two months now(not everyday though) and it has turned out to take a title: "THINGS FALL APART". First of all, the control for the vents at the jaw region vanished while riding(how? it still baffles me). This was followed by the control of the slider for the inner visor which recently removed(thankful it didn't fall off while riding). Both have occurred while I'm still yet to drop the helmet ever. GMAX needs to do a better job on these issues as I've also gotten similar complaints from a fellow user. January 5, 2015
Great helmet for the price I bought this after coming back to motorcycling after 20 years. the helmet technology change so much, its very comfortable. January 2, 2015
great fit This is the best fitting, quietest helmet I have ever owned. The sight window is very wide Great vision. The drop down sunvisor is great. Plenty of venting with lots of airflow. The best money I've spent......Very fast shipping by Revzilla December 29, 2014
2 3 4 5 ... 18 next>>
Use our Product Q&A for a chance to win our monthly $100 giveaways.

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, 26 Answers
Sort by:
RevZilla Store asked: Why did you choose this?
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