What PSI do you run?

[dirtyoldman]

305/70R16 GY Silent Armor M/S ''E''s,45-50psi.Because the Burb is so heavy the ride is pretty good

 

[hotrodpc]

My tires say Max Pressure 65, I am running 45-50psi.

 

[mblouir]

She said 35psi with the RARE occasion of adjusting MAYBE 2-3 psi up or down BUT STRONGLY suggested 35psi at all times.

I don't think I'll ever run mine @ 35 again. The guys that installed my wheels/tires (RimzOneOnline.com) set them @ 45 when they put them on. My mechanic dropped them down (without me knowing) to 35 at the first oil change/rotation after installing them. I only realized it after a while because the outsides were wearing where they weren't supposed to, which is why I raised it back up.

I'm not arguing Toyo's recommendation as I'm sure there's a good zone one can be in, but I don't see myself running these 33" Toyos at the same pressure as the tiny tires on my mother's Camry (~1/2 the weight), especially when they start showing signs of under-inflation at that pressure.

 

[Bernie]

She said 35psi with the RARE occasion of adjusting MAYBE 2-3 psi up or down BUT STRONGLY suggested 35psi at all times.

I'm going to disagree with Toyo on this one. The sticker on the door frame is for a specific size and load range of tire (not a specific brand either, as one person I know thought). Once you change to a different size and/or load range that sticker becomes meaningless. Don't think so? Got a car with one of those undersized temporary spares? Take a look at the inflation pressure specified for the spare and compare it with the door sticker. Also, many vehicle manufacturers specify a lower tire pressure than optimum, for the sake of a smoother ride.

Someone else here said it earlier that, for any given tire, and any given vehicle, there's a "zone" between underinflation and overinflation. Vehicle manufacturers usually go for the lower end of that zone with their inflation pressures, so you get decent tire wear but a comfortable ride. Usually that zone (depending on the tire) is about 6-8 psi "wide", and will have an effect on handling and fuel economy.

Want another example? My g/f's Dakota... Door sticker says that for the stock 215/75R15's tire pressure should be 28 front and rear. 28... In a 4x4 truck! Yeah, it gives a nice soft ride then, and wears the hell out of the outer edges of the tires.

One of the first things I did when we got together was bump the pressure up to 32 all around. Firmer ride, better handling, nice and even tire wear.

Then we went to a larger tire, 235's, in a higher load range (I was using the truck for work and carrying pretty heavy loads) and I bumped that to 34 front and between 36 and 40 rear, sometimes 42, depending on the load (max on these tires is 44).

Three years and 22,000 miles later and the tires are wearing perfectly. No worn shoulders, even tread depth across the entire tire, and the tires still have a good 25-30k miles left on them.

Do what you think is best for your truck, and your wallet, but I'd also strongly suggest doing some serious research on places like tirerack.com and find out the truth about proper inflation pressures. Don't just take my word, or the word of someone else, look it up yourself so you get a better understanding of it. After all, while ruined tires might put a big hole in your budget, that's not the worst thing that can happen. The worst is that an over or under inflated tire might suddenly fail, putting the lives of you, your passengers, and the people around you in other vehicles in serious danger.

 

[bubbatrucklover]

I don't think I'll ever run mine @ 35 again. The guys that installed my wheels/tires (RimzOneOnline.com) set them @ 45 when they put them on. My mechanic dropped them down (without me knowing) to 35 at the first oil change/rotation after installing them. I only realized it after a while because the outsides were wearing where they weren't supposed to, which is why I raised it back up.

I'm not arguing Toyo's recommendation as I'm sure there's a good zone one can be in, but I don't see myself running these 33" Toyos at the same pressure as the tiny tires on my mother's Camry (~1/2 the weight), especially when they start showing signs of under-inflation at that pressure.

Do what you think is best for your truck, and your wallet, but I'd also strongly suggest doing some serious research on places like tirerack.com and find out the truth about proper inflation pressures. Don't just take my word, or the word of someone else, look it up yourself so you get a better understanding of it.

Im not argueing with either of you and I respect your opinion.

It's just hard for me to think that Toyo would know less about their own product then RimzOneOnline.com,tires.rack.com etc.

e-mail from Toyo(varies slightly from the conversation I had with Debbie but, what she told me on the phone was parphrased in my o.p.)

From: ToyoTech
Sent: Tuesday, February 09, 2010 1:21 PM
To: '**********
Subject: ******-2010****

Thank you for contacting Toyo Tires USA. Your new Mud Terrain Tire in
size 37x13.50R17 can carry a single tire weight of 2835 pounds at 35
PSI. Depending on the original equipment tire we would recommend either
30 or 35 psi. (on the phone she said 35psi repeatedly with the "maybe 2-3 varience")


If you would like an exact please provide me with the OE
(original equipment) tire size located on the vehicles door placard. (35psi )

As far as a pressure when towing or carrying a load we do not make
recommendations on pressure and would suggest your tire dealer weigh the
load and advise of an appropriate pressure.( again on the phone she said 35psi repeatedly with the "maybe 2-3 varience")

Please let me know if you need anything further.

Sincerely, Debbie
Toyo Tires USA

The people who put my tires on (Tires Plus) just told me on the phone 35psi and also referenced the vehicle placard.

Even with all the research I (at some point) have to listen to someone.

With the manufacturer and retailer/installer BOTH confirming 35psi (and referencing GMs placard) I respectfully ask why I should question them?

Toyo's # is 714-236-2080 Tires Plus(one locaton in Jax) # is 904-786-8560

Please don't take this as an "I told you so" but, a serious question. Perhaps Y'all know a different question to ask them that would garner a different answer for diferent applications.

as to the 28psi on a placard that's what caused problems with Ford/Firestone.(according to Tires Plus Ford wanted that as the recomended PSI NOT Firestone)

 

[Zembonez]

I run mine as low as possible for the best ride (within reason)... I don't care about wear.

 

[Nick The Great]

I read somewhere (maybe even here) about drawing a chalk line on your tire. Then drive a bit, and see how the chalk wore off. Always seems like a good idea, but I still haven't busted out the chalk.

 

[Shanks12]

some interesting reading... i've got 305/55/20's Mickey Thompson ATZ's (Max 65psi) and I've been running them around 42-46. I have put them up higher, and it wasn't to bad of a ride. I think I had them at 55-60 (all 4's) and it wasn't to bad, mainly highway.

 

[mblouir]

Please don't take this as an "I told you so" but, a serious question. Perhaps Y'all know a different question to ask them that would garner a different answer for diferent applications.

No doubt, man, I'm always willing to learn something new or re-learn something. I agree with what you said earlier about the pressure being what holds the vehicle up. With that being the case, though, like I said, my mother's Camry weighs about 1/2 what my truck does and it runs with 35 psi.

Heck, for trial's sake I'll set my tires down to 35 psi for a while and see how it turns out.


I'm with you Jim, deep down I could care less about tread life, but it's fun to see how long it can last. As long as mine last me until I land a good job I'll be okay.

I read somewhere (maybe even here) about drawing a chalk line on your tire. Then drive a bit, and see how the chalk wore off. Always seems like a good idea, but I still haven't busted out the chalk.

I've been wanting to do that, but have also been too lazy to do so.

 

[bubbatrucklover]

I read somewhere (maybe even here) about drawing a chalk line on your tire. Then drive a bit, and see how the chalk wore off. Always seems like a good idea, but I still haven't busted out the chalk.

I never heard of that before but I like that idea.

No doubt, man, I'm always willing to learn something new or re-learn something. I agree with what you said earlier about the pressure being what holds the vehicle up. With that being the case, though, like I said, my mother's Camry weighs about 1/2 what my truck does and it runs with 35 psi.

Heck, for trial's sake I'll set my tires down to 35 psi for a while and see how it turns out.

That's cool. I won't pretend to know the "why" as to different vehicles and pressure.

I do know my truck rides better and as to wear I'll have to see.

When people say go to the source when in doubt.

I went to the two companies (Toyo and Tires Plus) that was in the equation and would have the most to loose with mis information.