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Aluminum alloy wheels have a number of significant advantages. First, the quality of aluminum alloy wheels is 65% lower than that of steel wheels. This greatly reduces the weight of the car wheel, thereby effectively improving the rotational inertia of the car wheel and accelerating acceleration. The application of aluminum alloy wheels can not only improve the acceleration of automobiles, but also play a role in promoting savings in automobile fuel consumption. High-end cars such as Audi use aluminum alloy wheels that have high hardness, wear resistance and corrosion resistance to greatly reduce the rolling resistance coefficient of the car wheel, thereby greatly reducing fuel consumption by improving acceleration performance which improves fuel efficiency.