Porsche Tequipment Winter Tire & Wheel packages are complete sets of factory wheels, tire pressure sensors and Porsche-approved (N-rated) winter tires. These packages are assembled & balanced at the factory and get shipped here from Germany. Every component in these packages are designed specifically for your Porsche, and are thoroughly tested at the Weissach testing facilities. All Porsche products are also covered under factory 2 year parts warranty.