Air preassure

[raymundo1]

I just bought 2 new Firestone steering tires and when they were done I asked the attendant at what preassure he left them, he said 100PSI, then I looked at the tire and it clearly said: 110PSI fully loaded (cold).
I told the attendant and he said that in the summer time everybody lowers the preassure because of the heat. So, I was wondering that the tire manufacturer would know about this preassure change with the heat and that is probably why he wrote (cold). Anyway I asked them to leave them at 105PSI thinking I should be safe in the middle.
What is your take on this?
I have an end dump usually fully loaded at 80,000lbs.

[heavyhaulerss]

105 i s fine. cold dont mean winter. just means pressure should be checked before you move vehicle. like in the morning. driving around the block or a few miles will increase pressure in hot weather especially. i run 105 all summer & 115 all winter. & check every 2 weeks.

[Fredog]

I just bought 2 new Firestone steering tires and when they were done I asked the attendant at what preassure he left them, he said 100PSI, then I looked at the tire and it clearly said: 110PSI fully loaded (cold).
I told the attendant and he said that in the summer time everybody lowers the preassure because of the heat. So, I was wondering that the tire manufacturer would know about this preassure change with the heat and that is probably why he wrote (cold). Anyway I asked them to leave them at 105PSI thinking I should be safe in the middle.
What is your take on this?
I have an end dump usually fully loaded at 80,000lbs.

your truck should have a sticker somewhere usually near the door with recommended tire pressure. you should always go by that.

[raymundo1]

I like your take, I'll go with 105 summer and 115 winter and as far as the sticker, I could not find it and shouldn't this preassures change by the tire brand? TX

[Fredog]

I like your take, I'll go with 105 summer and 115 winter and as far as the sticker, I could not find it and shouldn't this preassures change by the tire brand? TX

when I worked at a truck tire shop. I was told by the tire manufacturers that you should always go by what the sticker said on the truck... brand doesnt matter, as long as you stay the same size. if you cant find it, then just make sure you dont go over the rating on the tire, sounds like you are doing it right, you can tell if its overinflated, it will start wearing more in the middle, if its underinflated it will wear more on the sides.

[solo379]

Maximum load 6,175lb at 110psi cold -that's probably, what it said.
If the weight is less, you could keep lower air pressure.
I'm almost always at the limit on a steers, so i keep my at 110psi, summer or winter!

[jiptwoo]

I have always used 105 steers 100 drives and 95 trailer never a blow out.

[Kranky]

Why not just inflate to the pressure specified on the sidewall of the tire in question?

The company that produced the tire should know best what pressure it should be inflated to.

[dieselgrl]

Sidewall pressures are the maximum pressure a tire was designed to withstand, not the ideal running PSI.

[Kranky]

Sidewall pressures are the maximum pressure a tire was designed to withstand, not the ideal running PSI.

If you look at the tire sidewall, it states something to the effect:

Maximum weight capacity single xxxx lbs. at xxx psi cold, and
Maximum weight capacity dual xxxxlbs. at xxx psi cold.

The stated pressure is necessary for the tire to carry it's maximum rated load.

Ok, here's the real deal. If your floating down the road like a Cadillac then you don't have enough air. If your bouncing all over the place then you have too much. If people point as they drive by, you've lost a tire. If cars won't pass you, your about to lose a tire.

Come on people, you have to feel the road and look for the visual clues on tires and pressure....GEEZUS

[GMAN]

Or you could just use an air guage and check the pressure. :P

[Kranky]

The most important visual clue would be seeing the pressure reading on a tire gauge.

[raymundo1]

I wold try and contact the Firestone technical support department (IF THERE IS ONE AND i CAN GET IN TOUCH WITH THEM) but my guess is that they would say to keep the stated pressure on the side of the tire.
and somehow I agree: "The company that produced the tire should know best what pressure it should be inflated to"
Regards

[tweety bird]

I kid you not- my steers are stamped 130 psi cold, we have XOnes which are stamped 120 psi cold, and our trailer is tri-axle single tires stamped 130 psi cold for single (vs duals). Just try finding shops to put air in if you get low or have a leak... the truck stops don't even trust their own mechanics with anything more than 120 most of the time. And if I check my tires in the morning and they're at 105ish, by the time I drive up to the fuel island they're already at 115 or so. It stinks.

If you buy XOnes from most places they can't even fill them to the tire manufacturers recommended psi. That's a joke.

[uncleal13]

I ran a set of Michelin XDA-HT 11R24.5's at 85 psi running Canadian weights of 18,700 lbs per axle tandem dual.
See http://www.michelintruck.com/micheli...o?tread=XDA-HT

If you look at the manufacturers website and look up the load chart for your tires you'll see exactly how low you can go and still be o.k. The rating on the sidewall of the tire is the absolute maximum the tire can withstand. If you put in more pressure than what your truck maufacturer recommends then the tire will skip down the road and cup out early.