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I spoke with a man at discount tires today about the nitto terra grapplers. I was wondering about the weights of the sizes 295/70R17 and 285/75R17. Comes out that they weigh in at 56lbs a piece. If I were to ditch my 285/70R17 Firestone MT's (61lbs) would I see better or worse MPG going with either tire?
 

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Would depend on what kind of rolling resistance they have. Also the wider the tire the more wide resistance you would see so I would expect the 295 even though lighter to give you a little worse MPG or the same.
 
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