How many PSI do you run in YOUR tires?

[Unforgiven]

Goodyear Integrity P225/60R16's run at 40psi (44psi max sidewall info)
Looks like the original tires and have some sidewall cracking but still decent tread. Planning on replacing this fall I hope.

[cfg83]

Hello -

I wonder if this should be a Garage input option? I think it would need 3 fields :

Rated Max PSI
Actual Front PSI
Actual Rear PSI

To get really hard core, you'd need two more parameters :

Auto Manufacturer Recommended Front PSI
Auto Manufacturer Recommended Rear PSI

CarloSW2

[GdB]

I run the max rated 44psi. I notice a difference in acceleration.

[Christ]

Carlos -

How would that be affected if one were using 3 or even 4 different tires on their vehicle? You'd need a garage vehicle map with inputs to all four corners for all those specs, in that case.

I've been running the van at 40, except when it got down way low previously, because I'd forgotten to check them.

Also, I don't buy new tires. I buy them from the junkyard, usually in sets, if I can find them. I never replace my tires until they're worn out, as well. I've actually taken the energy to put a tire back on that had 2/32 of wear left, so I could burn it down. I hate it when I see perfectly good tires sitting on junk piles.

When one of my tires goes down too low, I replace that one, not the other three. I've been running cupped rear tires the whole time I've had the van, except when I had the 17's on it.

[cfg83]

Christ -

I didn't think of that. You're right, it would need to be an input for all four tires. This would also help people that have different size front/backs. Admittedly rare, but definitely an option for RWD cars (aka bigger diameter rears for taller gearing).

I don't know what to do about pre-worn tires.

CarloSW2

[rocket man]

My tires are rated for 51 psi on the sidewall. I have had the car for about 6000 miles now and have been running 50, 60 and now 70 psi. I am very happy with it with 70psi as the mileage is very good. It handles fine, corners even better with 70 psi than 60psi. Ride is very acceptable. The tires look like new, tread is wearing evenly. I realize that car and bicycle tires are different, but if flimsy bicycle tires can hold 120psi and still stay on the rim, of course steel belted radials will have no problem. By the way my tires had 60 psi in them when I bought the car. This car has a tire warning system, I thought it was only if the pressure got too low, but today I put 75 psi in them and about 15 min down the road, the warning light came on, so I reduced the pressure after they cooled down to 71.5. My thought is maybe at about 77 psi the warning comes on. I could recalibrate this device as I wanted to experiment with 80 and 90 psi, but for the time being will stay at 70. When the tires heat up they gain no more than 4psi at normal hwy speeds.

[UFO]

rocket man, if you would read the thread on the mythbuster's tire test, your mileage gains are minimal past a certain inflation. And you are running your tires seriously over-inflated; it's very risky to keep them inflated that much over the maximum rated pressure.

It's not the same a bicycle tire. Bicycle tires are rated for 120psi because they have very little area to pressurize, unlike a car tire. The maximum sidewall pressure is there for a reason.

My VW tires are rated for 44 psi, running at 40 psi.
I have two vehicles with LT tires rated for 80 psi, running at 42 psi.

My truck placard recommends 29 front, 35 rear. Similar for the other vehicles I think, I don't pay it much attention.

[Varn]

I run my tires at the maximum rated on the sidewall. 44psi

Semitruck tires can run at 80-110 psi. Good for economy.

[rocket man]

According to what most believe, I am running my tires with way too much pressure, but I did the research and tested myself and found I get noticibly better mileage with the higher pressure. At 70 psi , I am only 19 psi over what is listed on the sidewall. That is nothing to be worried about at all. Too many have been frightened needlessly from trying something that will absolutely put more life in your tires, give you better mileage and has no downside other than perhaps a slightly harsher ride. Do you see a big safety sticker stating"do not inflate over this pressure or death could be a side effect"? Absolutely not...that is ridiculous.... now if you talk about extreme..... that would be much higher than I have currently tried. There have always been motives and reasons mostly financial why certain "truths" are withheld in everything in life...medicine....and even tire pressure recommendations... The car companies put a certain pressure on the door...that is the absolute lowest pressure you should safely run and all they care about is the smoothest possible ride. The tire pressure listed on the sidewall has a huge safety margin built in, by going 15-20 psi over this....you are nowhere near its limit. Make your own decisions.

[bwilson4web]

Originally Posted by rocket man

According to what most believe, I am running my tires with way too much pressure, but I did the research and tested myself and found I get noticibly better mileage with the higher pressure. At 70 psi , I am only 19 psi over what is listed on the sidewall. That is nothing to be worried about at all. . . .

My understanding is police crusers also run over max pressure tires. It gives them more precise handling, longer life, and a little more performance from the lower rolling drag.

In my case, maximum sidewall pressure, 51 psi, accomplishes my goals so I'm happy. But I would have no problem with running up to 60 or 70 psi.

Bob Wilson