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The thread looks to me non-directional, other words, bi-directional.
Usually if the thread is mirrored from the circumferential center line, it's a directional tire. If the thread is 180 deg rotate-match along center line, it's a non-directional tire. Just 2 cents.
What brand and model of tire you got?
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01' 3.0i E53 (M54) with 164,000 miles 
07' 3.0si E83 (N52) with 134,000 miles 
08' 3.0si E70 (N52) with 91,000 miles 
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