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Old 18 May 2008, 05:00 pm
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Join Date: May 2008
Posts: 142
Question Tires

Hi everyone.....
Do lower profile tires and rims cause a decrease in mpg? I have a 2006 and would like 17" rims and tires.
Thank you in advance
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Old 18 May 2008, 05:45 pm
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Join Date: Sep 2001
Posts: 27,744
Default Re: Tires

If you use the Plus 1 approach to going bigger, the overall circumference of the 17 inch tire and wheel will be almost exactly the same as the 16 inch so there's hardly any change to your MPH or MPG.

I went with the 17 inch GT wheel on my Limited Edition. I had 205x55R16 and put on 205x50R17. Using a tire resizing calculator, there an .8% difference or at 60mph the speedometer will 59.9mph
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Old 21 May 2008, 02:08 pm
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Join Date: Nov 2003
Location: Felton, Delaware
Posts: 20,501
Default Re: Tires

Usually, yes. The wider footprint causes more rolling resistance than a skinnier tire. There is some variation by tire brand/model - "stickier" tire compunds, etc., but all things equal your best mileage is given by a skinny tire.
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Old 21 May 2008, 04:00 pm
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Join Date: Sep 2007
Location: Tierra Verde, FL
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Default Re: Tires

I noticed a small drop in mine, I am running Kumho 225/45/17's and 245/40/18's on the back. I don't mind though. I think the better grip is really worth it.
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