Ok folks - let me know what you think on this. We have a F350 1 ton diesel SRA and tow a 36 foot 5th wheel. We have had 2 of our Yokahama Light Truck 10 ply tires go bad within 10 days. The first got a bubble at the bead and started loosing air. Thankfully we caught it before it went fully flat.The second one literally exploded on us yesterday. We had just pulled off the freeway and were on a 6 lane street when it went. It also took out something in our week old breaks and we lost all of our rear break fluid.So here's my question to you all. We called Yokahama this morning and were told that you should not run the recommended tire pressure that is on the door of the truck. They told us that you were supposed to adjust the pressure based on how heavy of a rig you are towing and that the tire dealer can help us figure out what that should be. In all of the years we have been towing 5th wheels (3 different ones and 3 different sizes) I have never heard of this.What say you folks?

You need to weigh your rig to get the correct air pressure. This is true for TV, trailers of any type and MHs.

I am wondering what your door sticker is recommending on your 350? My 250 sticker shows front 75 psi, and rear 80 psi. I don't use that sticker pressure when not towing, but use exactly that, when I am towing my FW.IMO, with a 36' FW pin wt, and 10 ply rated E tires, you should have been using 80 psi on the rears.Many use the charts, for the exact wt on the axles/tires, and maybe add a bit more than the chart shows. How old were your tires?Jerry

On a SRW one ton I would think 80psi would be the correct pressure for towing.

Sounds to me like you was talking to the janitor at the tire dealer. You are doing exactly what you should do unless you know the exact weight of on the rear axle.I would do a little more digging with the tire dealer.Good luck.

You called the manufacturer of the tires and they told you the correct information. If you don't want to weigh your rig running your tires at the max inflation value on the tire will not hurt anything other than your kidneys from the rough ride. The door sticker only applies to the original tires that were on your truck. If you replace them with the exact same tires that door sticker will still apply. If you replace them with anything else go by the tire or the load/pressure table provided by that tire manufacturer.

Tires and their pressures | Good Sam Community

20 Replies

phillyg
Explorer II
Jul 26, 2021
As I understand it, the truck mfgr. sets the tire pressure to the maximum load the rear axle can carry, which is not always the max psi set by the tire mfgr. I don't think your FW has more than a 2900lb pin weight, so 75psi on an E-rated tire (without looking at a load chart) is probably about right.
Cummins12V98
Explorer III
Jul 26, 2021
"They told us that you were supposed to adjust the pressure based on how heavy of a rig you are towing and that the tire dealer can help us figure out what that should be."

OMG, actually suggesting knowing your weights and airing accordingly. What is this world coming to???
ACZL
Explorer
Jul 26, 2021
schlep1967 wrote:
You called the manufacturer of the tires and they told you the correct information. If you don't want to weigh your rig running your tires at the max inflation value on the tire will not hurt anything other than your kidneys from the rough ride.
The door sticker only applies to the original tires that were on your truck. If you replace them with the exact same tires that door sticker will still apply. If you replace them with anything else go by the tire or the load/pressure table provided by that tire manufacturer.

I agree with this as well.
Mickeyfan0805
Explorer
Jul 26, 2021
schlep1967 wrote:

The door sticker only applies to the original tires that were on your truck. If you replace them with the exact same tires that door sticker will still apply. If you replace them with anything else go by the tire or the load/pressure table provided by that tire manufacturer.

This is the key. If you want to go by charts and precise weights, that's fine. If not, max pressure as listed on the TIRE is what you should run while towing. The stickers are meaningless once the OEM tires are off the truck.
rhagfo
Explorer III
Jul 26, 2021
Questions;
How old are the tires?
How much weight on the rear axle loaded?
Have the tires been abused?
schlep1967
Nomad
Jul 26, 2021
You called the manufacturer of the tires and they told you the correct information. If you don't want to weigh your rig running your tires at the max inflation value on the tire will not hurt anything other than your kidneys from the rough ride.
The door sticker only applies to the original tires that were on your truck. If you replace them with the exact same tires that door sticker will still apply. If you replace them with anything else go by the tire or the load/pressure table provided by that tire manufacturer.
12th_Man_Fan
Explorer
Jul 26, 2021
Sounds to me like you was talking to the janitor at the tire dealer. You are doing exactly what you should do unless you know the exact weight of on the rear axle.

I would do a little more digging with the tire dealer.

Good luck.
garyp4951
Explorer III
Jul 26, 2021
On a SRW one ton I would think 80psi would be the correct pressure for towing.
MFL
Nomad II
Jul 26, 2021
I am wondering what your door sticker is recommending on your 350? My 250 sticker shows front 75 psi, and rear 80 psi. I don't use that sticker pressure when not towing, but use exactly that, when I am towing my FW.

IMO, with a 36' FW pin wt, and 10 ply rated E tires, you should have been using 80 psi on the rears.

Many use the charts, for the exact wt on the axles/tires, and maybe add a bit more than the chart shows.

How old were your tires?

Jerry
enblethen
Nomad
Jul 26, 2021
You need to weigh your rig to get the correct air pressure. This is true for TV, trailers of any type and MHs.

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Tires and their pressures

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