139.17 USD (20,650 JPY) 175.23 USD Save 21%
Delivery Information
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Size Chart For Helmet
How to measure the size of your head
First, measure the circumference of your head with a measuring tape.
Measure from the highest point of your forehead, just above your eyebrows, horizontally backwards to the highest point of the back of your head and around.
Based on the measurement, choose the size from the table below.
However, unlike hats, helmets cannot be sized by head circumference alone.
Also, helmets of the same manufacturer may feel different even if they are the same size depending on the model.

Ordering Size | XS | S | M | L | XL | 2XL |
Head Measurement (cm) | 53 - 54 cm | 55 - 56 cm | 57 - 58 cm | 59 - 60 cm | 61 - 62 cm | 63 - 64 cm |
* This universal size chart is for reference only. Sizes vary by manufacturer and product.
Product detail
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color Gray (frosted)
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color type solid
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Helmet Standard JIS ○
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Helmet PSC mark ○
[manufacturer's part number]
・Size S: 90791-1785W00
・Size M: 90791-1785M00
・Size L: 90791-1785L00
・Size XL: 90791-1785X00
Color: Gray (frosted)
JIS Standard
Cap Material: Polycarbonate composite material
Glasses slit & SUPERCOOL interior
Equipped with inner visor
Large ventilation system
Pin lock shield standard equipment (Pin lock seat is optional)
Stainless steel one-touch buckle (Made in Japan)
UV cut shield
**The helmet adaptive size is based on the head circumference.Please note that the fit may vary depending on the shape and thickness of the cheek area.
*Images may contain other colors.
*There may be changes in product specifications due to the manufacturer's reasons.
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A full face with a sun visor that is ZENITH's mastery of standards.
A helmet that is universally comfortable to wear and feels better the more you use it.
The interior has been carefully designed to ensure a long life.
*Shell made of strong polycarbonate composite.
SUPERCOOL interior with excellent sweat absorption and quick-drying, sterilizing effect.
Eyeglass slit interior for easy attachment of glasses or sunglasses.
Low center of gravity design to reduce fatigue after long hours of riding.
Aerodynamic design for reduced drag.
Points of Attention
* The helmets sold on this site are based on the Japanese safety standard.
We are not responsible for accidents, damage, injury, or any other related matters as a result of purchasing this product.