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Old 10-24-2012, 11:01 AM
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gfeiner gfeiner is offline
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Location: Houston, TX
 
Join Date: Jun 2003
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Mein Auto: 2012 X3 xDrive35i
Probably just due to supply. BMW would be foolish to only buy tires from one manufacturer. If that manufacturer were unable to deliver the quantities that BMW needs, BMW would be screwed. So BMW approves tires from different manufacturers to ensure they always have enough. When the BMW factory runs out of one brand, they switch to the backup brand.
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