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      07-02-2012, 09:01 AM   #3
GaryS
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Drives: 2009 135i 6MT
Join Date: Feb 2010
Location: Maryland

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2009 135i  [6.50]
225/40/18 front and 255/35/18 rear is popular in this forum. Those sizes will give a noticeably softer ride. If you're also switching from OE runflats to non-runflat tires like Michelin PSS, that will also give a softer ride.
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