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      02-18-2013, 02:42 AM   #71
loesch
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Drives: 2011 BMW 135i M Sport
Join Date: Feb 2012
Location: State College, PA

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Quote:
Originally Posted by hyphy1 View Post
Noob question: but what is the purpose of upping from 215 to 225 width fronts and the rears from 245 to 255?

More rubber in contact with the road = more traction. Less rotational mass = faster acceleration. +1 death to run flats. Why bother when I can press the SOS button on the roof and get a free fix-a-flat.