The stock tire BMW uses is from Continental. The stock size depends on the car.
Continental tires recommend different tires for different occasions. The weather affects what tires that should be used, as does the land that is traveled on.
Douglas is a division of goodyear. They are made in China and have a bad reputation for being of low quality.
Continental tires are available from a variety of sources. As Continental is a common brand, they can often be purchased from a a local tire supplier. Continental tires are also available to purchase online from ContinentalTire and Conti-Online.
continental
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MICHELIN TIRES
Douglas Tires are reviewed and rated by publications and websites such as Auto Guide, Car and Driver, Consumer Reports, 1010 Tires, Tire Rack, and Tire Review.
Tireteam and tire kingdom are two great companies to find cheap prices on continental tires for your sedan.
All tires that are unidirectional will have an arrow on them
Make the claim with the dealer that sold you the tires.
BF Goodrich, Uniroyal, Trivant, Continental tires.