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Wheel Spacers are made from Aluminum/Magnesium alloy. They are incredibly strong and very lightweight. These are hubcentric spacers that is specifically made to each vehicle; will fitted on your vehicle's original hub perfectly without any gap. Wheel spacers move the wheel out from the hub, effectively widening the stance of the vehicle and lowering its roll center. This simple modification increases lateral stability, which in turn provides improved handling and greater safety.
Note the 15mm spacer is not thick enough to completely cover the studs, which poke through a little beyond the spacer....thus you need a wheel with hollowed out backing plate (which is normal on most light wheels). Each package includes TWO bolt on spacers.