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			My WAG is that your profile change won't cause any problems. Plenty of people have gone from a 265/40 to a 275/40 without issue, though this is a much smaller change in diameter. 
 
One alternative might be a less performance oriented tire, such as an all-season tire, with softer side walls. Tirerack.com has ratings for ride comfort.
		 
		
		
		
		
		
		
		
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