Tire Pressure Question

Z

Zachary

New member
Hey Everyone,

I am new to this site, but not to 4Runners. I owned a 2000 Sport 2WD and loved it. I just purchased a 2005 Sport V8 4x4 and the biggest difference is the ride/handling.

My father owns a Sequoia that came with the Dunlop Grandtreks. At about 30,000 miles the tires started to separate. Based on what I have read on this forum, most of you agree.

I have also noticed that most of you recommended the Revos. I read the reviews at tirerack and other sites and noticed an overwhelimg support for the Revos, so I paid $670 for the Toyota dealer to install the Revos right away (I sold the Dunlops on ebay for $255).

My question is this. The Revos (at least our tire size - 265/65-17) has a max pressure rating of 44psi. The Dunlops were 51psi, but Toyota (per the side door instructions) recommends 32psi. That's a huge difference. Toyota put 32psi in the REVOS and the truck was SMOOOOTH, but I felt that 32psi was too low and thus would cause damage to the tires as I believe it would be under inflated. Then I put it up to 41psi and the truck road rough and very bouncy. My brother also has a Sequoia and he did the same thing. He said that his tires (stock Dunlops) started to show choppy wear and also bounced like a mule. He reduced it down to 32, rotated the tires, and the tires smoothed out. He has about 15,000 miles on them right now.

So back to my Revos. I took it back down to 35psi. It's not as bumpy as 41psi, and not as smooth as 32psi. Should I take it down to 32psi or down to about 34?

For those of you who have Revos, at what psi do you have your tires? Is 35 the best pressure?

Thanks,
Zachary
 
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Well,i think the more pressure the better the mileage so i setteled on about 40psi.
But if you can't stand the ride lower it.:)
 
Ive kind of gone through the same thing. I have the same tires but 265/70/16 on a 2000.

Ive filled them up to 40psi a couple times for better gas mileage and to wear them evenly in different. Having more pressure will wear the cent part of the tread faster.

During the hotter months I dont fill to 40 maybe 38 or 37 because the heat expands the air. Sometimes I feel the car rolls and is a little faster with more pressure(less resistance)??
 
I have 265/70/17 Revos on my 04 and I run about 38-40 psi. I had them at 32 psi for about one full tank of gas. My mpg is a little bit better when I run them at 40 psi. The tires seem to wear evenly at 40 Psi.
 
I have my Revos set at 35psi. I think that I may raise them to 36 or 37 and see what happens. For me, 41 was just too bouncy. Still, I'm glad to hear that you guys are getting even wear at 40psi.

Zachary
 
I have a question thats kinda going the opposite...

Whats the lowest you drop the psi for offroading conditions. Ive never gone below 30psi because I did not want to damage....
 
4x4Runner09 said:
I have a question thats kinda going the opposite...

Whats the lowest you drop the psi for offroading conditions. Ive never gone below 30psi because I did not want to damage....
Click to expand...


18psi on the stock Dunflops.

I think a few others including Bulldog even go down to 15PSI on their Revos.
 
You will find many different opinions on the tire pressure issue.
I usually recommend that you try experimenting until you find the pressure that works best for the way you drive.

I have a set of 275/70/16 REVOs I use in the winter, and I found that 35 psi works best for me. Anything higher, and the steering starts to wander. But my OEM Bridgestone H/Ts run well at 37 in the summer. It has been my experience that higher pressures tend to give me better road feel and control. And I am willing to put up with a somwhat harsher ride for that.
 
Fill your tires with whatever pressure your door sticker recommends.

Mine recommends 29 psi.

If you want better mileage, start increasing by 3 psi until you find the ride too uncomfortable.

If you're going to drive on sand, reduce it to 20 psi.
 
a3fnqpjw said:
how much psi would you reccommend for factory installed Bridge Stones 17" ??
Click to expand...

There's a sticker that must be on your driver's doorsill.
That sticker has the manufacturer recommended psi for front and rear tires.
 
Interesting....

My 4Runner is now two weeks old, and I decided to check the tire pressure today.

Recommended is 32psi....they were all 30psi. Do you think the dealership did that on purpose?
 
Re: Interesting....

curtis said:
My 4Runner is now two weeks old, and I decided to check the tire pressure today.

Recommended is 32psi....they were all 30psi. Do you think the dealership did that on purpose?
Click to expand...

Mine recommends 29psi and came with 36psi. My father's came with 43 psi.

If you use it mostly on highways, use 32 psi for good fuel economy.

When you do offroad, reduce it to 28 psi.
 
Michelin Cross Terrain

I run my CTs at 35 psi during the week. While they ride slightly better at 32 psi, I do get better gas mileage (approx. 1 mpg) at the higher pressure.

During mild off-roading and camping excusrsions I run between 24 and 28, depending upon the terrain.

(If these CTs ever wear out. I'll try the Revos).

Try different pressures and see what works for you.
 
I know this has been mentioned in another thread but the tried and true way to make sure you tires are wearing evenly across the thread is to use some chalk and color a 3-4 inch wide line from the inside of the tread to outside. Set your tires for X (Higher to start with) pressure. Take a short drive and check the chalk line. If the chalk line is not worn off from inside to outside. then reapply the chalk reduce the pressure 1-2psi and repeat until you find the pressure at which the line wears off completely or evenly from inside to outside. The pressures may be different from front to back, infact more than likely they will be. Depending on the tire construction and load rating it could be below 30psi, But with the 4Runner I would guess the weight balance from front to back is not to far off from 50/50.

Has anyone ever had their truck weighted on a scale that can give you each axels weight.

You can kind of see the same effect if you ride down a dirt road and then drive down a paved road and look at the dust line remaining on the tread.

Just my opinion and you know what those are like. I personally run mine at 30 rear and 31 front. I just now have 5k on the tires and only time will tell. You are not going to cause any damage running the tires that low. It is not like you are running at 90+MPH all day long. Good luck.
 
4x4Runner09 said:
Will running Revos at 38-40psi all the time cause damage? Besides to my back... :( ??
Click to expand...

You have to watch for abnormal tire wear. Usually, too high pressure will accelerate the wear in the center of the tire. On my '03, higher tire pressure (37) on the REVO's also caused handling problems, the steering tended to wander. When I dropped the pressure to 35, the steering problem went away. It will probably take some experimentation on your part to find the pressure that works best for you.
 
I see many threads talking about air pressure. And great if I can change the pressure and get better gas milage. I haven't tried it yet but will.

But why do you get better milage with higher pressure? Less rubber on the road = less drag ?
 
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