I have my OEM Bridgestone's. I only use chains when I drive to the Sierra's. Where I live I never encounter snow. The chains are only if things get really bad and I want to keep moving. It's the law if you have a 2 wheel drive. Occasionally even if you have 4 wheel drive chains are required but by then you would have to be crazy to be out driving.

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2013 X5 3.5i M Sport
2004 M3 cabriolet SMG