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  #13  
Old 11-03-2011, 09:38 PM
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Re: Overinflating tires..good Idea or bad Idea?

I got a thread on this about tire pressure. It has a calutor on what to put in the tire based on the max psi. I got max psi of 51 on my 20 inch tires. I was putting in33 psi way to little I put 38 psi in it rides great I got better mpg. Just look for the tire psi calutor
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Old 11-03-2011, 11:08 PM
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Re: Overinflating tires..good Idea or bad Idea?

i have mine at 35psi, at 33 they were visibly more flat on the ground, MPG was up by .5-1mpg with the adjusted inflation
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  #15  
Old 11-04-2011, 10:05 AM
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Re: Overinflating tires..good Idea or bad Idea?

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Originally Posted by bradley4kc View Post
Reread your original post. Overinflating your tires means less rubber on the pavement - that means WORSE handling. Bad idea. Especially on wet, snowy, or icy roads.
This is not correct. Narrow tires are actually better in the snow. They can easily cut through it, and reach pavement. The analogy I have always heard for this is a knife works better than a spoon to cut butter. Less contact patch equals mores driving force downward, which is much better for snowy conditions.
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Old 11-04-2011, 10:53 AM
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Re: Overinflating tires..good Idea or bad Idea?

im rolling at 32 PSI on all 4 corners.
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  #17  
Old 11-04-2011, 12:21 PM
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Re: Overinflating tires..good Idea or bad Idea?

Quote:
Originally Posted by Redpit View Post
This is not correct. Narrow tires are actually better in the snow. They can easily cut through it, and reach pavement. The analogy I have always heard for this is a knife works better than a spoon to cut butter. Less contact patch equals mores driving force downward, which is much better for snowy conditions.
Yes - but if that contact patch is minimized by overinflation, then there is less rubber to the ground once it "cuts" through the snow. The bottom line is, the smaller the area of rubber contacting the road - the worse the handling. Overinflating the tires reduces the amount of contact. Why do you think we air down when we take our Jeeps off the road. It gives more surface contact and grab to the tire.
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Old 11-04-2011, 02:39 PM
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Re: Overinflating tires..good Idea or bad Idea?

It almost sounds like if tire pressure is more of a matter of taste than concern, if not seriously overinflated.
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Old 11-04-2011, 08:18 PM
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Re: Overinflating tires..good Idea or bad Idea?

I think you got that about right BF. I overinflate a pound or 2 in summer (for economy) and run at 33 in the winter.
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  #20  
Old 11-08-2011, 10:34 AM
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Re: Overinflating tires..good Idea or bad Idea?

2 lbs is not going to make that much difference. Tire pressures also change by about 1 psi for every 10 degree change in outside temperature.
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Old 11-08-2011, 10:53 AM
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Re: Overinflating tires..good Idea or bad Idea?

My rear passenger tire always seems to lose the most air. Any suggestions?
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Old 11-11-2011, 11:06 AM
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Re: Overinflating tires..good Idea or bad Idea?

Take it off, submerge it in a tub of water and look for bubbles...you might have a leak at the air valve. If it's a really slow leak, you may not see anything. Dish soap and a little water around the valve might help show any leaks too.
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Old 11-11-2011, 11:11 AM
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Re: Overinflating tires..good Idea or bad Idea?

Thank you kind sir
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  #24  
Old 12-13-2012, 06:33 PM
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Re: Overinflating tires..good Idea or bad Idea?

Quote:
Originally Posted by bradley4kc View Post
Yes - but if that contact patch is minimized by overinflation, then there is less rubber to the ground once it "cuts" through the snow. The bottom line is, the smaller the area of rubber contacting the road - the worse the handling. Overinflating the tires reduces the amount of contact. Why do you think we air down when we take our Jeeps off the road. It gives more surface contact and grab to the tire.
In theory what you say and what the math guy said is true about contact patch. In reality something else happens when you overinflate a tire. The side wall stiffens, and that will trump a small contact patch decrease in the handling dept. I added 5-10 psi (depending on ambient air temp) to a tire when I took my sports car to a track day. (to improve handling)
Granted this sidewall phenomenon effects a low profile tire more than a big side walled All Terrain, but many of the tires on JGC's these days are highway tires with lower profiles. Especially if you're sportin 20's
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