Jason Rightmire
New Member
Posts: 18
Registered:
11/20/07
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From: CA
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4/22/2008 7:18p
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My truck has 4:10 gears and 315 70 R17 "34 inch" tires on it right now, If I put 37 inch tire on it could I gain MPG? I would be doing less rpms at 70 MPH. Right now I am doing about 2250 rpms at 70-75 MPH and getting about 450-500 miles per tank. thanks
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bhdodge
New Member
Posts: 4
Registered:
5/3/08
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From: MO
Truck: 2006 2500
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5/3/2008 12:14a
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Thats a good Question if everything pans out right I will be puttin bigger on mine as well.
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Fullpull3 
50 PSI Member
Posts: 1,407
Registered:
3/8/06
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From: FL
Truck: 2005 2500
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8/31/2008 7:13a
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More rubber = more weight lift kit = more aero drag I dont think you will see any real gains in fuel mildge to off set cost of tires and lift but it will sure look Good.
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Dingy4040
New Member
Posts: 4
Registered:
3/4/09
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From: MN
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3/4 6:35p
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im with fullpull you get the new tires they in turn weigh alot more and do indeed catch more wind so it takes more power and fuel to get up to speed and stay there
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pipehand
New Member
Posts: 1
Registered:
6/27/09
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From: OH
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6/27 4:26p
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the weight is a factor but its not how much air they catch the taller the tires the wider they r thay they have more rolling resistence with the road also take mire power to get em rollin so i doubt u will c any mileage improvement if any u might lose 1 *or* 2mpg
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