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Old 11-06-2008, 03:45 PM   #1
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Exclamation Winter is approaching...adjust your tire pressure!

If you're running high pressure in your tires, you may need to lower it somewhat for winter. Be aware of it and consider experimenting with tire pressure again when there's a lot of rain and/or snow.
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Old 11-06-2008, 03:55 PM   #2
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So I need to decrease the pressure when the temperature is below freezing point (and much less... hehe)?
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Old 11-06-2008, 04:09 PM   #3
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Maybe. I can think of logic to support either conclusion. I just think it merits revisiting the issue.

This thought was prompted by a post on another forum. A guy with oversize tires on his truck found that in lots of rain he needed to lower his pressure by 10% to get a safe amount of traction.
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Old 11-06-2008, 07:17 PM   #4
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with lower temperatures, tire pressure will decrease too.
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Old 11-06-2008, 08:29 PM   #5
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True, but at least lower it to manufacturer reccomended.
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Old 11-07-2008, 06:15 AM   #6
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Nitrogen can help with tire pressure fluctuation. I run it in mine and my wife's vehicles.
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Old 11-07-2008, 07:10 AM   #7
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I run 78% nitrogen in all my tires. I even get it for free!
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Old 11-07-2008, 07:11 AM   #8
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I've heard various supposed benefits to running nitrogen in your tires, some more plausible than others, but this is a new one on me. How exactly does nitrogen prevent temperature from affecting tire pressure (or reduce the effect, even).

Before you answer, consider that almost 80% of our atmosphere is nitrogen so any benefit from nitrogen is already 80% present in regular compressed air...
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Old 11-07-2008, 07:41 AM   #9
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Nitrogen is less prone to expansion and contraction with tempurature variations. We started putting it in all the new cars we sell because customers were coming in with their tire pressure monitoring lights every other day. It was driving them and us crazy. The problems have dropped off to almost nothing since we started putting the nitrogen in. It's also supposed be less corrosive on aluminum rims, but I don't have any info to back that claim up, that's just what they told us in training. As far as claims that it increases fuel economy, those claims are from people who were running low tire pressure to begin with. We had a lady complaining (imagine that, a woman complaining) about her fuel economy, we went to put the nitrogen in and her most inflated tire was at 24 lbs. Look for a deal on it. We charge $40 regular price, $30 when it's the service managers "special".
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Old 11-07-2008, 07:52 AM   #10
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According to NASA's studies, higher pressure is better against hydroplaning. I believe it correlates with 1/sqrt(pressure), so it's a diminishing returns thing. However, lowering the pressure would make it more likely to hydroplane, not less.

Snow may very well be another story. I can't comment on that.
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