Cyber U-378 Helmet

$89.99 (10% off)

This Purchase Qualifies For:

  • Description
  • Reviews (0)
  • Q&A (1)
  • Sizing Chart
  • ABS/PC shell construction.
  • Internal retractable sun shield.
  • Removable washable liner.
  • Reflector for night safety.
  • Meets or exceeds D.O.T. standards.
Total Questions (1)
Questions with answers:
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1-1 of 1
knucklebuster 2 years 2 months ago Location: Tennessee, USA
What head shape type does this helmet fit?
Shoei fits my head which is round not oval and wide across the cheek bones. Normally a Bell and Nolan 43 fits also. How does this helmet fit compare? Cyber U-378
Top 1 Contributor
1 year 3 months ago
We have a sizing chart listed online for Cyber U-378 Helmet on the product page. Please refer to that to help with your sizing. We are constantly working to get more size charts added to our site. Sizing can vary between manufacturers so if you have specific questions please call one of our sales professionals.

Dirt Bike / ATV: 1-888-676-8853
Sport Motorcycle: 1-866-677-7338
Cruiser: 1-866-333-8033
Also keep in mind that we have a FREE FIRST EXCHANGE PROGRAM available for this product if you need to exchange it for a different size!
1-1 of 1
SizeHead CircumferenceHat Size
X-Small 20.375" - 21.125" (51.8 - 53.7 cm) -
Small 20.5" (53 cm) 6.5
Medium 21.24" (55 cm) 6.75
Large 22.875" (59 cm) 7.25
X-Large 23.625" (61 cm) 7.5
2X-Large 24.5" (63 cm) 7.75
3X-Large 25.25" (65 cm) 8


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. When done properly, you will have measured the largest part of your 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.