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			very good point; yes low profiles are really sensitive to this; they were okay as checked with my gauge...but I will try another 
 
the spacer vibration was quite violent and 110; 130kph so this seem to point to a problem with them rather than a  tire pressure differential. 
 
to further complicate this thread I did have a lower rear stress bar put on at the same time!!!?
		 
		
		
		
		
		
		
		
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