GMax GM45S Half Helmet.

Item Code: GMaxGM45SSolid



Color:Flat Black and Black

Certifications:DOT approved

Gmax leads The helmet industry with another innovative helmet, the GM45S half Helmet. Lightweight small shell design that sits down on your head with Gmax industry leading 'fit' and 'no bull venting design' all for a reasonable price!


  • Premium venting reduces heat at the top of the head, comfort liner, shell and styro designed for max venting without reducing the integrity of the helmet
  • Gmax premium fit for the maximum comfort
  • Premium soft materials used for padded chin strap covering
  • DOT approved shell and premium styro
  • Always do chin strap up securely' security warnings

Size Chart

Helmet Sizing Information.We ask that you use the following information to help choose the proper size helmet. In order for a helmet to protect properly and be the most comfortable, it must be size to your head correctly.

To find the Correct size helmet for a person's head:

  1. Measure the head circumference one-inch above the eyebrows and ears
  2. Using the circumference measured, use the size chart below to find the approximate size
  3. Once you have tried on the helmet it should fell snug equally around the head. The helmet should not feel too tight or too loose at any point around head.

*** Please remember that all head shapes vary slightly and that this sizing chart is to be used as a starting guide, not an exact guide.

Metric cmInchesLetterNumber
53 - 54cm 21-1/4" - 21-5/8"XS 6-3/4 - 6-7/8
55 - 56cm22" - 22-7/16"S7 - 7-1/8
57 - 58cm 22-13/16" - 23-1/4"M 7-1/4 - 7-3/8
59 - 60cm 23-5/8" - 24"L 7-1/2 - 7-5/8
61 - 62cm 24-3/8" - 24-13/16"XL 7-3/4 - 7-7/8
63 - 64cm 25-3/16" - 25-5/8"XXL8 - 8-1/8
65 - 66cm26" - 26-3/8" XXXL 8-1/4 - 8-3/8
67 - 68cm 26-1/2" - 26-5/8" XXXXL 

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Most Helpful Reviews :

Yer Basic Shorty

by - verified purchaser
Hey, it's black, it fits real well. What more is there to say?

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Great helmet

by - verified purchaser
It fits well and doesn't catch the wind as bad as some of the other helmets I have used. My neighbor checked it out and liked it so much that he had me order one for him. Jafrum did a great job getting it to me, I ordered it Saturday night and had it on Thursday morning.

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Great Helmet

by - verified purchaser
I purchased this helmet about three weeks ago. The fit was on spot and the look was great. No bobble-head. This helmet saved my life. I was run off the road and crashed my motorcycle. The helmet protected my head, no concusion and no blackout. It did the job and then some. I will buy this helmet again.

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Gmax GM45S Helmet Review

by - verified purchaser
Good fit, sizing chart was helpful, great quality for a great price

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Nice Helmet

by - verified purchaser
Awesome fit and looks. I was amazed how fast the shipping was to hawaii! Mahalo

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GMax GM45S Solid Review

by - verified purchaser
Great helmet. No wind whip. No neck strain. Rides low. No pop down visor. Very comfortable. It is by far my all time favorite helmet. I have 5 different styles of GMax helmets. All of them fit like they were designed for my head. I just hope they aren't going to discontinue this model like they have the GM55S but just in case. I stocked up at $36.95 a pop. As far as I'm concerned that is one heck of a deal. Thanks GMax: If you read this. Don't stop making it. it's a great product.

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GMax GM45S Solid Review

by - verified purchaser
The Gmax brand helmets, whether it be a half or open face, fit my head as well as a helmet ever could. The GM45S is the best everyday use helmet that I have ever owned. Been using them for many years. I have never had a problem with any of the Gmax. Quality is good. Comfort couldn't get any better. I like the GM45S for my everyday so well that I just stocked up on a couple of extra.

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Browse 1 question and 1 answer
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Why did you choose this?
Jafrum Store
comfortable light weight plain jane for summer rides
Dan J onMay 27, 2015