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      12-14-2012, 05:20 PM   #25
Z K
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Drives: E90 M3, MK6 GLI
Join Date: Jul 2011
Location: San Francisco

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The PSS definitely has stiffer sidewalls so it improves the "feel" of the road and less tire squirm. I used to run high PSI on the PS2 to alleviate sidewall flex. The PSS doesn't need the same PSI to do the same.