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					Originally Posted by Anker  If you have PSM there is a possibility that the different wheel diameter will confuse it and cause interesting things to happen. As a rule, the outside diameter of the wheel should not change, unless you do so for all four wheels. PSM uses rotation sensors in the wheels to determine whether they are slipping.
 A 245/40/17 has a smaller outer diameter than a 255/40/17.
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 Wheel diameter is irrelevant, tire diameter is what matters.
		 
				__________________OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods.  Deep sump oil pan with DT40 oil.
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