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Unread 07-18-2013, 12:36 PM   #1
snowman91
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2003 WJ 
 
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Tire pressure for bb with 245/75/16

I have a 2" bb and bigger tires (245/75/16) on and I was wondering what I should set the psi to for good gas mileage. I'm getting roughly 12.5 in the city.

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Unread 07-18-2013, 01:03 PM   #2
jserna
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Start with 33-35psi.
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Unread 07-18-2013, 02:16 PM   #3
cubalz
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12.5 mpg in town sounds about right.....
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Unread 07-18-2013, 04:00 PM   #4
gatorchin
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Yeah..probably not gonna get much better
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Unread 07-18-2013, 04:35 PM   #5
Snafe
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Go with what is recommended by the factory. Any higher or lower will either cause safety issues, or unintentional wear. You can get better mpg with higher psi, then it feels like you're driving on rocks, and increase risk of blowout.

Honestly, I'm not a mechanic, but I learned this one from Mythbusters! (If I had to believe anyone on TV, it would be them) :P
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Unread 07-18-2013, 04:38 PM   #6
Planetcat
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Depends on the max inflation rating of the tire and the load rating. I had load range E BFG KM2's in 245/75r16 that I ran at about 22 because they were so stiff. As a rule of thumb, I usually go anywhere from 2-5 psi below the max on my car and truck. Usually a couple psi higher in the front due to the engine weight.
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Unread 07-18-2013, 06:03 PM   #7
snowman91
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Quote:
Originally Posted by Snafe
Go with what is recommended by the factory. Any higher or lower will either cause safety issues, or unintentional wear. You can get better mpg with higher psi, then it feels like you're driving on rocks, and increase risk of blowout.

Honestly, I'm not a mechanic, but I learned this one from Mythbusters! (If I had to believe anyone on TV, it would be them) :P
I would go by recommended but I'm running a bigger size tire so it's not factory.
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Unread 07-18-2013, 06:04 PM   #8
the88thpianoman
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You're leaving out the most important information: what kind of tires do you have?
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