GMax OF77 Derk Helmet
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  • GMax OF77 Derk Helmet - Matte Black/Silver

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MSRP
$104.95
Savings (10%):
$10.49
Price
$94.46

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Video Reviews (2)

GMax OF77 Derk Helmet Videos

Scale
Weight: 3.25 lbs

What's this?

GMax OF77 Derk Helmet

The GMax OF77 Helmet is based off of the very successful GM67. It features the Spa Soft and CoolMax interior and multi-density cheek pads. The OF77 is like having two helmets in one. It offers the comfort of an open helmet, plus it quickly and easily converts to a full face helmet for those looking for increased protection and comfort with the installation of the optional jaw piece.

Features:

  • Lightweight DOT approved Thermo-Plastic Alloy shell
  • Anti-fog coated inner sun shield easily raised or lowered with a lever located on the exterior of the helmet
  • Cheek pads feature a multi-density foam construction creating a superior fit
  • Optional removable jaw piece (sold separately)
  • SPC top front vents/interior and styro designed for a controlled air flow
  • DEVS 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.
  • Large eye port for improved peripheral and range of vision
  • Spa Soft, CoolMax comfort liner and cheek pads move the moisture away from your body and the fabric dried quickly
  • Removable/washable interior and adjustable cheek pads allow for more comfortable sizing
  • Deluxe ear pockets with built in space for speakers for use of communication systems
  • Soft padded chin strap
  • Helmet bag included
  • Optional LED light kit (sold separately)
4.4 / 5
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
4.5 / 5
Style
5 / 5
Air Flow
3.5 / 5
Fit
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Weight
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GMax Helmet Sizing

Size Head (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.

How To Measure

H Head Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
Product Style RevZilla Item # Manufacturer Product # Availability
Matte Black/Silver / 2XL 1122884 G3773398 TC-12F In Stock: Ships within 24 hours
Matte Black/Silver / 3XL 1122885 G3773399 TC-12F In Stock: Ships within 24 hours
Matte Black/Silver / LG 1122886 G3773396 TC-12F In Stock: Ships within 24 hours
Matte Black/Silver / MD 1122887 G3773395 TC-12F In Stock: Ships within 24 hours
Matte Black/Silver / SM 1122888 G3773394 TC-12F In Stock: Ships within 24 hours
Matte Black/Silver / XL 1122889 G3773397 TC-12F In Stock: Ships within 24 hours
Matte Black/Silver / XS 1122890 G3773393 TC-12F In Stock: Ships within 24 hours

Shipping

Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.

Returns

If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
5.0 / 5.0
1 Review
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Bang For The Buck
5.0 / 5
Protection & Durability
5.0 / 5
Features
5.0 / 5
Comfort
5.0 / 5
Style
5.0 / 5
Air Flow
4.0 / 5
Fit
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Weight
Light
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Heavy
Vision
Narrow
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Loud
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Weight
Light
Avg
Heavy
Vision
Narrow
Avg
Wide
Noise Level
Quiet
Avg
Loud
Air Flow
4 / 5
Comfort on the go
Finally I had the chance to use my new he helmet. The comfort and look are refreshing?. Love the sun shade. This is a recommended buy.
June 15, 2017
Purchased
10 months ago
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 OF77 Derk Helmet? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

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Browse 7 questions Browse 7 questions and 3 answers
Why did you choose this?
RevZilla Store
i think this helmet looks sharp
Daniel S on Feb 19, 2017
i think this helmet looks sharp
Daniel S on Feb 19, 2017
Is it comfortable with glasses?
A shopper on Jul 9, 2016
BEST ANSWER: Yes, had no trouble