The JWL standard (Japan Light Alloy Wheel standard) is a set of requirements for alloy wheels set by the Ministry of Land, Infrastructure, Transport and Tourism (Japan) that must he nicl for all passcngcr cars in Japan. The JWL mark, cast or furged into the wheel, indicates that the wheel has been seIf-certi?ed by its' manufacturer to meet the standard. There is a related standard, JWL-T, for truck and bus wheels.
VIA: A third-party entity called the Vehicle Inspection Association verifies whether a product meets the requiremens prescribed by the JWI or JWL-T standard. This assosiation permits a product to bear a VIA mark if it passes rigorous quality and strength verifaction test conducted in accordance with the JWL or JWL-T standard.
Dynamic Cornering Fatigue Test
The transverse forces which affect the wheel during driving through bends are simulated.
Dynamic Radial Fatigue Test
The stress to the wheel going straight or cornering is simulated.
Impact Test
The strength (center disc, rim flange, assembled part) against breaking and air-leak is simulated.
Air Lake Test
Dai Alloys wheels air leakage test is done with helium which is more advanced than traditional water bath leakage test.
X-Ray Test
These tests are conducted to detect structural flaws, porosity, air holes and inclusions.
A load rating refers to a maximum allowable weight that a given wheel has been tested and rated at. All wheels can be rated differently, for instance the wheels on a passenger car will require a smaller load rating than the wheels on a heavier SUV. A vehicle manufacturer will give a standard GVWR (Gross Vehicle Weight Rating) to each of its vehicles. This rating is the maximum allowable weight for a fully loaded vehicle which includes passengers and extra equipment. At that point each of the wheels is tested and rated according to the GVWR of all the vehicles they were meant to be mounted on. The Dai Alloys wheels load rating is higher than 690kg.
Protect the finish of your new wheels by regularly washing them with mild soap and warm water. Before washing your wheels, allow them to cool and never spray them with cold water while they are still hot. Chrome wheels or polished wheels that do not have a clear coat can be protected even further by using a wax, cream, or polishing cleaner, but these products should not be used on clear-coated wheels. Steam cleaners and strong chemicals used in car washes can be damaging to the finish of your wheel.
This is a plastic ring that sits inside the alloy wheel, locating it centrally on the car's wheel hub. The hub centric ring doesn't form part of the mechanical join between the car and the wheel, that's done by the wheel nuts/studs. The hub centric ring simply makes sure that the wheel is located centrally on the hub. If it wasn't, the wheel nuts/studs would have to center the wheel, and if the wheel wasn't perfectly central on the hub, there could be possible vibration and balance problems.
The handling can be improved by running larger wheels on your Truck. Generally larger Truck wheels mean that you will run a lower profile tire and usually a wider tire. The low profile tire often performs better when cornering and braking, as tire roll is greatly reduced. Extremely large wheels are heavier and can increase braking distances.