Several days ago, this Cadillac ATS installed BONOSS Forged Active Cooling Wheel Spacers, front 30mm (6/5”), rear 20mm (4/5”), PCD 5×115, CB 70.3. They are specifically made to fit this vehicle and enhance the handling performance, meanwhile, achieving an aggressive look. They match perfectly with the factory wheels, due to the actual measuring data. And the hub centric design makes a firm connection between wheel and axle hub, ensuring no vibrations through the wheels. Click the video on the left, let Grace show you her tuning work for this Cadillac ATS.