Max Wheel Air pressure rating

[A/S Squared]

Greetings to all!
I have a friend who just installed Load Range E tires on her 25' International. Does anybody know what the max. air pressure the stock rims are rated for? I tried looking on the inside of the rim, but could not find it.

[BDandTTs]

Our Aluminum wheels are clearly stamped inside (or backside of rim) with the maximum pressure allowed. Maybe his are also, but it would have been better to check before replacing the tires. Keep your fingers crossed.

[streamair]

Are the wheels stamped with a max load capacity?

Typically, load capacity and max air pressure go hand-in-hand. So, if your wheel is compatible with your tire, then the load capacity stamped on the sidewall of your tire should be the guideline to use. Be sure the load capacity on your wheel is greater than the load capacity on your new tire.

Hope this helps!

[jcanavera]

The Alcoa forged 5 spoke 15x7j wheels are rated to 95 psi on my 2004 Classic SO.

Jack

[SilverCabin]

Thanks Jack for your post above. Where on the wheel did you find that stamp? Hopefully, not inside.

I have a 2014 FC FB that came with aluminum wheels and Goodyear Marathons with a max inflation pressure of 65 psi. I have since changed tires to Goodyear Endurance with a max inflation pressure of 80 psi.

I have been running my Endurance tires at 70 psi because the load pressure tables say that I don't need the max pressure for the Airstream's loaded weight. (I could run as low as 35 psi, but that seems too little.) However, the tire experts recommend running tandem axle trailer tires at their max inflation pressuere because of something called Interply Shear.

If I'm running the tires at 80 psi, on a hot day the pressure could rise by 15 – 20% (92 – 100 psi). I'm wondering if my wheels could take that pressure, and if Airstream is using different wheels now that they are using Goodyear Endurance tires.

Randy

[ROBERT CROSS]

Originally Posted by streamair

Are the wheels stamped with a max load capacity?

Typically, load capacity and max air pressure go hand-in-hand. So, if your wheel is compatible with your tire, then the load capacity stamped on the sidewall of your tire should be the guideline to use. Be sure the load capacity on your wheel is greater than the load capacity on your new tire.

Hope this helps!

Yes they are/were in 2003....

Bob
🇺🇸

[SilverCabin]

Originally Posted by ROBERT CROSS

Yes they are/were in 2003....

Bob
🇺🇸

Hi Bob,

That looks like the inboard edge of a steel rim. Is that correct?

Randy

[mikeinca]

Originally Posted by SilverCabin

If I'm running the tires at 80 psi, on a hot day the pressure could rise by 15 – 20% (92 – 100 psi). I'm wondering if my wheels could take that pressure, and if Airstream is using different wheels now that they are using Goodyear Endurance tires.

Randy

I also make adjustments for hot weather running. I've seen readings from my integrated Ford trailer TPMS system as high as 98 PSI on a 95 degree day which I don't believe does the trailer much good and is probably not optimal for the tires either. In hot weather I'll start out with "cold" pressures somewhat less than the recommended 80 PSI; typically in the low 70's.

To your point, I don't know what the wheels on my 2020 GT are rated for, but running near 100 PSI seems like a bad idea regardless.

[ROBERT CROSS]

Originally Posted by SilverCabin

Hi Bob,

That looks like the inboard edge of a steel rim. Is that correct?

Randy

Yes & no...it is the inside edge the OEM wheel for our '03 Classic. But it's not steel.
The nicest feature, its uncoated aluminum, easy to keep look'n good.

Bob
🇺🇸

[CapriRacer]

Originally Posted by streamair

Are the wheels stamped with a max load capacity? .....

It is my understanding that there are no regulations requiring max pressure to be stamped on wheels (Max load, too!) It must be that wheels hardly ever fail from things other than accidents, so the government saw no need to require that information to be stamped on the wheel.

Further, my research indicates that pressure doesn't pay much of a role in the stresses on the wheel - as opposed to the load. The testing of wheels involves load, but not pressure.

[n2916s]

If you run your tires at 80 psi when the tire manufacturer’s load chart calls for half that, you are essentially bolting Fred Flintstone’s tires onto your trailer. In both the short and long run, that can’t be good.

I run mine at 65 psi (2008 27’ Safari). Fours years on GYE’s, about 18000 miles, no failures, normal wear.

[SilverCabin]

Originally Posted by n2916s

If you run your tires at 80 psi when the tire manufacturer’s load chart calls for half that, you are essentially bolting Fred Flintstone’s tires onto your trailer. In both the short and long run, that can’t be good.

I run mine at 65 psi (2008 27’ Safari). Fours years on GYE’s, about 18000 miles, no failures, normal wear.

I couldn't agree more. In fact, I have been running my two year old GYE tires at 70 psi for 10,600 miles now. The trailer seems to be riding well (no excessive bouncing, things inside stay in place) and the tire wear is perfect. I just got concerned when I read about Interply Shear. I guess 10 psi might not make that much of a difference in the internal wear.

Thanks for responding,

Randy