"JWL", Japan Light Wheel Alloy logo.
Japanese wheels must have a "JWL" logo stamped on the wheel.
"JWL" (Japan Light Wheel Alloy) is a compilation of standards defined by the Japanese Government to ensure the vehicle's safety for aluminum road wheels. Every wheel put to market must be tested to meet JWL standards before a wheel can be put out to market in Japan.
These standards are generally accepted worldwide as acceptable for most road conditions. That is why you will see these marks on European and other Asian country wheels.
Japan Light Alloy Wheel Association, while maintaining close contact with their member companies, carries out research and technical studies concerning the manufacture, marketing and distribution of automotive light alloy wheels.
These activities also include market and technical research aimed at developing new demand for industry products plus many other related activities.
To achieve these objectives, Japan Light Alloy Wheel Association aims to improve quality of Automobile
Light Alloy Wheel and promotes liability of their product in the Automotive-After market.
Major objectives also include the following
In order to maintain safety standards, supports the "JWL" and "JWL-T" technical standard and promotes "JAWA" VIA Registration System.
"JAWA" is also lending its support to the efforts to find solutions to material recycling system.
(source: Japan Light Wheel Alloy)
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