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  #1  
Old 06-26-2013, 07:44 PM
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Default upgraded tires, what tire pressure?

I went from the stock 265/70/17 and upgraded to 285/70/17. The stock tire pressure is 35PSI I believe. What should I put in the 285's? Should I have a little bit more pressure?
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Old 06-26-2013, 08:09 PM
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Leave it the same.
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Old 06-26-2013, 08:44 PM
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Quote:
Originally Posted by Grubrunner View Post
Leave it the same.
This^
Keep it with the OE spec.
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Old 06-26-2013, 09:29 PM
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Ok thanks, Ill leave it the same as the 265s
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Old 06-26-2013, 09:42 PM
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Good call.

It's not a significant alteration in size to warrant any drastic PSI changes. Also, my suggestion was based on my assumption that you stuck with near or identical tread pattern [tire type] to OEM, as you didn't disclose anything other; correct?

HERE is a good read regarding your concerns and then some more.

Though, I'll say up front, I don't agree with all the content.

Good luck.
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Old 06-26-2013, 09:47 PM
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That's correct, I stuck with a fairly similar tread pattern. It's an A/T tire but isn't overly aggressive. The tire is a Bridgestone dueler A/T revo 2.

I also read somewhere that the ideal tire size for any tire is 10% less than what the sidewall of the tire says. The author made some good points. I'll check out your link too. I appreciate it.
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Old 06-27-2013, 08:00 AM
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Just for the record....tire PSI is not relative to the tire size. PSI is a measured value; meaning you have more volume of air, but pressure would remain constant.
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Old 06-27-2013, 09:51 AM
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It is totally dependent on the load rating. You don't want to be running 35 psi in 80 psi rated tires.
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Old 06-27-2013, 11:32 AM
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35 PSI is fine on a tire that has an 80 PSI rating if it is on a RAM 1500. The 80 PSI rating on the sidewall is the MAX inflated pressure to meet the MAX load rating printed in the sidewall. The lower the PSI the lower the allowable weight capacity.
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