The manual says to use 29 psi all the way around.......
I think this is way to soft for my tires that have a max inflation of 44 psi. (stock 205x65x15)
Right now, I am set at 35 Front, 32 Rear, and it feels good.
What tire pressure's do you like?
Take Care.....

 

I looked the other day cuz my fronts looked low, but they are at 42. I like how it feels, sticks when I need it but slides when I want it to. rear I don't know, haven't checked.

 

you should keep em lower than 35, around 30. i made this mistake too. on the tire it said max of 44 so i said what the hell i'll inflate them to 40. but the air in the tire expands when you're driving and i ended up screwing up my tires in about 15k miles of their 50k mile lifetime.

 

you'll cause the tire to wear out prematurely if their over-inflated. but by all means keep the pressure that high if you like buying new set of tires faster than usual. i try to keep mine between 30-32 psi.

 

keep it at 32 psi...yesterday i put too much air into my two front5 tires and one of them expanded then ripped, the other had a big a$$ bump.

 

that's usually from running over nasty stuff with the pressures too high. they usually won't just do that from having high pressures.

 

I always keep the front and rear set to 32psi.

 

28front 34 rear

 

Hey ********, don't mess with wrong tire inflation! Remember those stinkin' Explorer's?

My factory sticker says 28 front, 30 rear for that wheel but most manufacturers are usually soft by around 2-3psi 'for comfort'. 30 - 34 is gonna be correct pressure for factory wheels & most standard / medium performance tires. Reduce pressure 2-3psi in 100 degree+ climates if doing regular highway speeds.

Overinflate and you'll wear out the center tread patch quicker, they'll be less contact on the road meaning a greater loss of traction on corners - esp in the rain. The side walls are designed to give good lateral support & overinflation leads to the center part of the tire taking that load - meaning higher chance of catastrophic failure.

Underinflate and you'll wear out the side tread patches quicker, the wheels will have less lateral support meaning a higher chance of rim damage and/or rollover on heavy cornering, and rainwater is more likely to get trapped under the center tread patch leading to aquaplaning.

The bottom line: under/overinflation compromises your's & everyone's safety & is just plain dumb. If in doubt about correct pressures for your non-factory wheel / tire combo, get advice from a good performance tire shop.

 

I've ran 40 PSI for quite a while and never had a problem. If the tire is over inflated it will wear in the center of the tire which is pretty obvious. The tires that crapped out sounds like they were defective in the first place. I'm not sure how much the air will expand but it shouldn't expand enough beyond the safety factor built into the tire to compromise it's integrity. Manufactures have a safety factor built into their products. So that tire could probably hold safely (but not smart to do it) close to 50 psi before you run into trouble. Factor in the fact that the manufacture must make a tire that can run at freeway speeds at their maximum rated inflation value anyway and knowing that the tire pressure will be increasing above the 44 psi value. Just my two cents, flame me if you want.

 

Def flame your dumbass, fella... 40PSI??? You've gotta be kidding! Re-read what I wrote & THINK about it. Sure, you can drive around with overinflated pressures. But when you have the accident, and hurt another person, they'll sue your butt if they find you've been driving with wrong pressures (and some cops actually check these things).
If that doesn't wake you up, if you're involved in an accident that kills someone, and the overinflated tires are deemed a contributing factor, you're facing vehicular manslaughter charges - even negligent homicide. It's as simple as that. I've seen the results of too many fatal accidents due to incorrect tire pressures causing incorrect tire wear.

BTW you're argument is like saying that drugs companies factor in people taking more than the prescribed amount of say, anti-depressants - the anti-depressant must remain safe at a 50% loading. That may be okay for the first week or two but then the drug reaches a toxic level & it'll rip your stomach lining, adversely affect your mental state, alter your blood pressure so you're more prone to clotting, strokes, etc. Why would you purposely increase your prescription drug intake when you're aware of the side effects?
Doesn't make any sense.

 

That was a pretty good flame for the most part... Of course a few things I have to disagree on. First 40 PSI is below manufactures specification so if the tire is rated to hold pressure at 44 PSI it isn't going to have a problem at 40 PSI. That is not an over inflated pressure for the tire.

Also, my arguement about a safety factor comes from an engineering persepective which by the way is what we are talking about here, an engineered product, not a drug... Engineers have to assume that their product is going to be taken past it's claimed specifications at some point in the products life. Like an airline Jet. The safety margin built into an aircraft is there to provide just that little bit of assurance. Same with the tire, which I'm not advocating to inflate it past max value specified by the tire manufacture, just that you shouldn't have problems if you stay withen the specs of the manufacture.

This isn't a drug where the drug should be taken under direct supervision by a doctor. Engineers do not get to supervise the use of their products to make sure everyone is using it correctly... You are comparing apples to oranges.

Oh, last thing, just how many accidents have you seen due to incorrect tire pressure anyway... I think there were other circumstances involved in the accident aside from an over inflated tire, which by the way must be higher then the tire manufactures rating (in our case above 44psi).

 

professional reccomends the max to be 8psi below max psi. if unsure 32psi is almost a garantee. the stock psi of 28 is mainly for comfort but will grip better than higher preassure also, awin win situation.

 

Okay, comparing tires to drugs is apples & oranges, but it's a good analogy. Yes, tires are engineered to take higher loadings. Tire companies don't know what the application of there tire is going to be - it may sit on a heavy Max or it may sit on a lighter NX2000. They have to build in a large degree of safety into the tires to suit a variety of applications. They also have to build the tires to perform in dry & wet weather, it has to last x miles, and be relatively puncture resistant. If the tread is punctured, they are designed to deflate without blowing out. They are not however, engineered to aircraft standards - they'd be way too expensive.

From an engineering point of view, the 44psi max value is derived from the sustained speed rating of the tire at the maximum weight loading. The faster the car goes, the hotter the air in the tires get, thereby increasing pressure. The cold pressure may only be 32psi, but after you've been driving at 70 for an hour or two, the pressure could be as high as 36-38psi. Now if you started at 40, you've got no safety margin. Your tires are also part of your suspension system - they're designed to flex & absorb all the bumps & dips in the road. This increases the stress loading on the tires as they have to deal with road irregularities and the suspension travel at the same time. Overinflated tires have less flex leading to a much higher chance of sidewall failure. If you want your tires to have less flex (which is why you're having to run them at 40psi), opt for high performance, low profile tires which are better engineered for higher loadings.

As for accidents, you only have to go back a couple of years & look at the Bridgestone / Ford Explporer debacle. Most rollovers were caused in part by tire failure due to incorrect tire pressures. The tires didn't fail because of faulty workmanship (despite the massive recall & class action suit), they failed because Ford had incorrect inflation recommendations. Most were underinflated leading the tread to peel off (tread bonding to the sidewall failure), some were overinflated causing sidewall blowouts.

As a video editor, I've seen the end result of poor tire inflation in the programs I've made. Tires that were a contributing factor had abnormal wear patterns consistent with incorrect pressures - leading to total loss of vehicle control. Whilst the drivers may have been the instigator of the accident, the tires couln't perform as expected because they were unusually stressed.

The only thing keeping your car on the road are your tires. If you're running 205's, that's a contact patch of 8x4 for each tire at any one point. If you overinflate, the tread on the sides have less contact with the road, meaning a much reduced contact patch.

Again, don't mess with the tire pressures. If the sticker says 28, you can safely run them at 30 - 32 with no compromise grip & comfort. They'll last a little longer at 30 - 32psi and give better low speed handling. 40psi is asking for trouble - better to reduce it to a max of 34.

Finally, if you maim or kill your buddy and having overinflated tires fail on you is a contributing factor, that's something you're gonna have to live with for the rest of your life. And everytime you see your buddy or his family, you're gonna be reminded of that. Again, vehicular manslaughter and/or negligient homicide come to mind. Just ain't worth the risk.

 

jeez, let's just say keep your tires PROPERLY inflated, based on the tire's manufacturer levels.

 

But hey, it does make a good read. The flow of information is great.

 

I run about 35psi fronts and 30psi rears. Just trying that out for a few weeks to see if the mileage goes up and if the peformance suffers any. I wouldn't pump up the tires to their max psi amount because when the tire gets hot, the psi inside will increase PAST the max psi limits. I also like to run a little higher pressure because when low profile tires get low on air ie.. 235-245-45-17s, it's damn hard to tell it's low(until it's too late)

 

Just a quick clarification. Max PSI on my tires is 44. The max I ever run is 40psi. I'm not advocating inflating past manufactures specs, just that you can stay within manufactures specs and not have any problems.

 

No - keep your tires PROPERLY inflated based on the vehicle manufacturer's sticker...