probably a result of the porsche ordering system...
high end porsche are all made to order or for certain application, the reason they may have to use spacers is the rich idiot filling out the form wanting larger/smaller wheels than the car is suppose to have
im not sure about the legality of this for australia but but i would speculate that there would be some fine lines drawn somewhere... i suspect that a car is designed for a size allocation in mind and exceeding the size allocation by more than 2" would be illegal unless otherwise used for track etc




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