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Old 04-20-2013, 08:15 AM
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tires for better fuel economy

I'm going to be getting 18in wheels in the near future. I'm looking to get better fuel economy when changing my tires. I'm looking at 275x60Rx18s or 285x65rx18s Nitto terra grapplers. Which tire size should give me better fuel economy?
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Old 04-20-2013, 08:19 AM
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The 275 will be lighter, therefore, better mileage. How noticable...probably not much. Get the 285, they will look better!
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Old 04-20-2013, 08:20 AM
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Your 275s will give you sightly better bc there is less friction involved and a slightly smaller tire meaning less weight. Now, how much will it make a difference? Being that they are that little of difference (.5" wider and 1" in diameter) it probably will not make much of a difference at all that could be noticed, so personal preference on what you like.. my .02
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Old 04-20-2013, 08:46 AM
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When I had 285s on my truck it seemed like I was getting better fuel economy than on the stock size tires.
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Old 04-20-2013, 09:08 AM
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A 20" rim weighs 10lbs more than an identical 17" rim
A 35x12.5r20 weighs 10lbs more than a 35x12.5r17 of the same mfg.

Stick with the 18s you have and that will help too.
I would go with the 285 if I were you, I believe the improvement in effect gear ratio will offset the added weight and look way better.
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Old 04-20-2013, 09:11 AM
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I have 16s on it now will be going to 18s
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Old 04-20-2013, 09:53 AM
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Right on! What I like about 18's is there seems to a lot of available sizes.
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Old 04-20-2013, 10:06 AM
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yea I think I'm going with the black n milled rockstars with 285x65r18s
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