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AFX FX-90 Black Flag Helmet.

AFX FX-90 with its Aerodynamic shell design, is extremely lightweight. You will have better visibility through the optically correct, compound-curved shield while not worrying about the heat with its Seven points of ventilation. This AFX helmet meets or exceeds both ECE 22.05 and DOT FMVSS-218 motorcycle helmet safety standards.


  • Fully removable liner and cheek pads
  • Flush-fit optically correct compound-curved shield
  • Seven-point high-flow ventilation
  • D-ring with chin strap holder

Size Chart


1. MEASURE YOUR HEAD. Determine the circumference of the widest part of your head by using a flexible tape measure. Generally, the widest part of a person's head is the area 2.5 cm (1") above the eyes and ears. However, we suggest measuring at a few points both above and below that line to determine the greatest measurement before referring to our size tables. We also suggest testing the fit of a helmet one size smaller and one size larger then what the chart recommends. No helmet can provide protection if it's too uncomfortable to wear. If you would like further detailed instructions on how to determine your correct size please look at our AFX Helmet Fitting Guide.

Size Chart

SizeCMHat SizeInches
X-Small54-55cm6 3/4-6 7/821 1/4"-21 5/8"
Small56-57cm7-7 1/822"-22 7/16"
Medium58-59cm7 1/4-7 3/822 13/16"-23 1/4"
Large60-61cm7 1/2-7 5/823 5/8"-24"
X-Large62-63cm7 3/4-7 7/824 3/8"-24 13/46"
2X-Large64-65cm8-8 1/825 3/16"-25 5/8"
3X-Large66-67cm8 1/4-8 3/826"-26 3/8"
4X-Large68-69cm8 1/2-8 5/826 3/4"-27 1/8"

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Most Helpful Reviews :

Awesome AFX FX-90 Black Flag Helmet

by - verified purchaser
This is a great helmet. Very light and comfortable. Need to order using the parameters on the CM guide. I was right on the cusp for sizing so took the safe bet and went up one size. My thoughts process was that I could alsways use the room for ear buds/phones on long trips. There really are seven vents so if you do size up, the air will get in there and create lift pulling on your head. I really do love this helmet and would encourage anyone to buy it. I still don't understand how you guys get to my door in 2 days.

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by - verified purchaser
Awesome! Awesome! Awsome! My husband loved this gift for Christmas. The details and colors are bright, the helmet fit very well and is very comfortable to wear while he is riding.!

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Browse 1 question and 1 answer
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I already have the FX-90 Black Flag helmet but the mouth vent piece has fallen off. Is it possible to get just the vent piece without buying the whole helmet?


Doug P on Mar 11, 2015
Best Answer:They do not sell them separately. Have you tried calling AFX to see if they will send one to you?
Reply (1) · Report · Justin PStaff on Mar 12, 2015