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AGV K4 EVO Helmet

5.00 out of 5 stars

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  • Description
  • Reviews (1)
  • Q&A (1)
  • Sizing Chart

The K-4 is the most balanced and versatile helmet in the AGV range, and suited to wear on both motorcycles and scooters for racing, touring, and city use. Inspired by Airtech philosophy, the K-4 helmet improves its technical features and design in order to offer the ideal solution for riders in search of an attractive, safe, and comfortable helmet with an extremely competitive quality / price ratio.

  • Outer shell: ACF (Advanced Composite Fiber) fiberglass.
  • Outer Shell sizes: 2.
  • Ventilation system: Dynamic system with air vents and rear extractors.
  • Fabric: Dry-Comfort with sanitizing treatment.
  • Internal padding: Removable and washable.
  • Visor: Street 8 clear visor in non-scratch and anti-fog polycarbonate.
  • Visor mechanism: XQRS (Extra Quick Release System): Visor removal and replacement without tools in just a few seconds. PVS (Perimetrical Visor Seal).
  • Fastening system: Buckle with micrometric adjustment; theft prevention ring on the strap.
  • Certifications: DOT, E2205.

The design of the K-4 Evo reflects that of the K-4, the model it replaces in the range. A design distinguished by the front air vents, the chin strap, the lateral lines and the spoiler, creating an immediate family feeling with other products in the recent AGV range.

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Overall 5 out of 5 stars
Sizing - Fit true to size?
Location: Los Angeles, CA, USA
AGV K4 Evo Helmet

I got the Red one - great helmet, makes you visible for others on the road. Very light and very comfortable.

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Total Questions (1)
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jack 2 years 5 months ago
Hi does this helmet come with australian starndard sticker ?
MotoSport Staff
2 years 4 months ago Location: Portland, OR, USA
Unfortunately this helmet is only US DOT and ECE 22.05 certified and does not carry the Australian Standard Sticker. After doing some research, if this helmet is sold in Australia and is constructed identical to the US and European helmet specifications, you may be able to get away with it not having the sticker. You will need to check with your local law enforcement to verify if this is absolutely correct or not.
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SizeHead CircumferenceHat Size
X-Small 20 7/8" - 21 1/4" (53 - 54 cm) 6 5/8 - 6 3/4
Small 21 5/8" - 22" (55 - 56 cm) 6 7/8 - 7
Medium 22 3/8" - 22 3/4" (57 - 58 cm) 7 1/8 - 7 1/4
Large 23 1/8" - 23 1/2" (59 - 60 cm) 7 3/8 - 7 1/2
X-Large 24" - 24 3/8" (61 - 62 cm) 7 5/8 - 7 3/4
2X-Large 24 3/4" - 25 1/8" (63 - 64 cm) 7 7/8 - 8
3X-Large 25 5/8" - 26" (65 - 66 cm) -


1. Measure your head size. To do this, pass a tape measure horizontally around your head at a height of about one inch above your eye-brows and across the largest portion of the back of the head.

2. Check your measurement with the helmet sizing chart and select the closest size. As the helmet may not always meet your head size exactly, and your head measurement may fall between two sizes, first try the smaller size.


1. Expand the helmet opening by pulling outwards on each chinstrap, and slide your head into the helmet. If you are unfamiliar with helmets you may be reluctant to pull the helmet down, as it may feel too tight. Even if the helmet is difficult to put on, please use the smallest helmet possible. The helmet should feel snug. If the helmet is not tight, it is too big for you. New helmets will break in and loosen slightly over time.

2. Once the helmet is on:

  • Check that the helmet inner lining fits snugly all around your head.
  • Check that the top pad presses on the top of your head.
  • Check that the cheek pads press up against your cheeks. When you open and close your mouth, you should drag your teeth along the inside of your cheeks.
  • Check to make sure that you cannot easily slide your finger into the helmet along the side of your temple.
  • Hold the helmet with one hand on each side. Without moving your head, try to move the helmet up and down, and side to side. You should feel the skin of your head and face being pulled as you try to move the helmet. If you can move the helmet around easily, it is too big. Try a smaller size. Please note that during this check, the chinstraps should be properly fastened.