JIMNLIN
Oklahoma
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Quote:We just put on 4 new Goodyear Endurance tires on the 5th wheel. The tire says to run at 80psi and that is what the tire company put in them.
The label on the 5th wheel says to run 65psi in the tires.
Which should we follow? One of us says the label recommendation and the other says the tire recommendation.
What say you? Please advise!
Goodyear tire knows about tires on trailers and offer best advice .
Special Considerations
***Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up.***
Most likely the 65 psi on the tire placard was for a OEM load D tire (65 psi). Unlike tire placards on a truck...most modern trailer tire placards recommend max sidewall pressures for the OEM tire size and load range on the placard.
Tires on a trailer operate in a much more severe service (side scrubbing) on every turn as Goodyear mentions.
Sounds like the Endurance are a tire uprate to a load E at 80 psi. I would run them at 80 psi but watch the center on the tread for wearing faster (over inflation issue).
When a trailer is over tired you can run a chalk line test. Run a chalk line across the tread...then drive in a straight line till the chalk line starts to wear off. You want the same wear across the entire tread for best long term wear/service life/braking on wet pavement/etc.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
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Cummins12V98
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Load/inflation charts are there for a REASON !!!!!!!
Know your weights and follow plus 5psi. It's VERY simple. Lower psi is JUST FINE if you know your weights.
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laknox
Arizona
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prstlk wrote:This has probably been asked before but because we are leaving in the AM for the summer I need quick advise from the folks on here.
We have a 2013 Ford F350 SRW 6.7L Diesel and a new to us 2016 Keystone Cougar 30' fifth wheel.
We just put on 4 new Goodyear Endurance tires on the 5th wheel. The tire says to run at 80psi and that is what the tire company put in them.
The label on the 5th wheel says to run 65psi in the tires.
Which should we follow? One of us says the label recommendation and the other says the tire recommendation.
What say you? Please advise!
Your rig is almost certainly placarded for D-range tires, which are 65 psi. Your new GYs are E-rated, which is why the sidewalls say 80 psi. Personally, I'd run the GYs at 70, since you're "over-tired" for the weight of your FW. Will ride a bit better and you'll have a bit more "footprint" on the road. Even then, if you check a load chart, you'll have more tire capacity than the D's at 65 psi.
Lyle
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Cummins12V98
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laknox wrote:prstlk wrote:This has probably been asked before but because we are leaving in the AM for the summer I need quick advise from the folks on here.
We have a 2013 Ford F350 SRW 6.7L Diesel and a new to us 2016 Keystone Cougar 30' fifth wheel.
We just put on 4 new Goodyear Endurance tires on the 5th wheel. The tire says to run at 80psi and that is what the tire company put in them.
The label on the 5th wheel says to run 65psi in the tires.
Which should we follow? One of us says the label recommendation and the other says the tire recommendation.
What say you? Please advise!
Your rig is almost certainly placarded for D-range tires, which are 65 psi. Your new GYs are E-rated, which is why the sidewalls say 80 psi. Personally, I'd run the GYs at 70, since you're "over-tired" for the weight of your FW. Will ride a bit better and you'll have a bit more "footprint" on the road. Even then, if you check a load chart, you'll have more tire capacity than the D's at 65 psi.
Lyle
The "E" at 65 is the same as the "D" at 65. BUT with a more solid tire. My boat trailer came with 50psi "C" tires and I run my ENDURANCE tires at 50psi. G
Good thing I did have the extra capacity as I had a total bearing failure and removed the bad tire/wheel and aired the other tire to 70psi. Drove 50 miles at 50 mph or less stopping twice to check tire temp and it did not exceed 117 on a 70 degree day.
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valhalla360
No paticular place.
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nickthehunter wrote:The label on the 5th wheel also likely has a tire size and type on it also. If the tires you put on don’t match the label, then the pressure listed on the label is irrelevant. Your best bet is to go with the tire manufacturer’s tire load inflation chart.
That's my guess for why there is a discrepancy between sidewall and trailer sticker.
Keep them all the same PSI but anywhere from 65 to 80 is probably fine. I would lean toward the upper end so long as you don't see it beating up the trailer as you go down the road.
Tammy & Mike
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Cummins12V98
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"Your best bet is to go with the tire manufacturer’s tire load inflation chart."
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Retired JSO
North Georgia Mountains
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65 psi was for a D rated tire. The new tires are E rated and 80 PSI. Run the new tires At 80 cold. As temperatures warm, you may need to adjust the cold PSI.
* This post was
edited 05/06/23 12:53pm by Retired JSO *
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Mike134
Elgin, IL
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I swapped from C to D tires on my trailer and ran them at the full 65 PSI, old ones were recommended for 50 PSI.
That caused just the center of the tire to wear out but hey at least I didn't have to worry about them aging out LOL. Now I run them around 50-53 psi per the GY inflation tables and CAT scale results, which gives me uniform tire wear across the tread.
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Cummins12V98
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Retired JSO wrote:65 psi was for a D rated tire. The new tires are E rated and 80 PSI. Run the new tires At 80 cold. As temperatures warm, you may need to adjust the cold PSI.
PLEASE explain WHY you say to run the "E" tires at 80psi?
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Cummins12V98
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Mike134 wrote:I swapped from C to D tires on my trailer and ran them at the full 65 PSI, old ones were recommended for 50 PSI.
That caused just the center of the tire to wear out but hey at least I didn't have to worry about them aging out LOL. Now I run them around 50-53 psi per the GY inflation tables and CAT scale results, which gives me uniform tire wear across the tread.
Another "CHICKEN DINNER" !!!!!!!!!
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