Community Forums

CyrusL · 06-08-2023, 02:02 PM

Unfortunately, after all my research it turns out the tires I wanted to get are on recall and not available for a little while. I don't have a Plan B. So what other tires are available for my Class C RV? It's an E 450, so I want to get the extra weight rating of the commercial tires. Tell me what tires you like and why. Obviously, I'm looking for something very safe. But I'm also looking for something quiet. I wouldn't say money is no object, but I'm certainly willing to spend the money for a good tire. Help!

Ron Dittmer · 06-08-2023, 05:46 PM

I have the standard "E" rated Cross Climate tires for our smaller/lighter E350 rig. I am "very" happy with them. If I had a max-loaded class C, I would want the Michelin tires that you say are currently under a recall.....just wait for them if your current tires can remain in service for one more RVing season.

sibe · 06-10-2023, 05:58 AM

There are a few other "commercial" 121/122 versions from TOYO, BF, Hancook, Firestone etc..

I have used TOYO and off brand Delta in that lil more weight group.. They worked well, ride was a bit stiffer.. I had then on a E350 but towed and was at the axle limit +... Still at Load E if a regular tire .. But the commercial stayed less skirmish...

I went back to regular Load E on current E350.. I dont tow as heavy and like the ride... dishes dont rattle.. LOL

But on the newer rigs with sildes and the MORE GVWR.. go for the heavier tires

CyrusL · 06-10-2023, 08:54 AM

After much more digging, I went with the Toyo Celsius Cargo (commercial). They get installed a little later today. I'm having some issues finding the inflation chart for them, but they definitely can take the weight I'm going to be putting on them. I'll report in later with any opinions after I've driven on them for a while.

rtaggio · 06-10-2023, 09:06 AM

Quote:

Originally Posted by CyrusL

After much more digging, I went with the Toyo Celsius Cargo (commercial). They get installed a little later today. I'm having some issues finding the inflation chart for them, but they definitely can take the weight I'm going to be putting on them. I'll report in later with any opinions after I've driven on them for a while.

I went with Kumho Cragen 121R tires and I am also looking for an inflation chart

Ron Dittmer · 06-10-2023, 10:47 AM

I wonder if the inflation chart is the same across brands of the same tire size and the E+ load rating. Some time ago, I did a comparison on standard "E" rated tires of the same size and noticed they were identical across brands. Maybe you could use the Michelin chart for the other comparable tires. It would be a good starting point, better than guessing.

CharlesinGA · 06-10-2023, 11:10 AM

Inflation chart is the same across the board for a specific tire size and type.https://rvsafety.com/images/pdf/mich...ionrvtruck.pdf

Second page of the PDF, marked page 21, second tire down.
https://rvsafety.com/images/pdf/mich...ionrvtruck.pdf

Charles

CyrusL · 06-10-2023, 01:09 PM

Quote:

Originally Posted by CharlesinGA

Inflation chart is the same across the board for a specific tire size and type.https://rvsafety.com/images/pdf/mich...ionrvtruck.pdf

Second page of the PDF, marked page 21, second tire down.
https://rvsafety.com/images/pdf/mich...ionrvtruck.pdf

Charles

Interesting. I guess I didn't realize that it was the same for all manufacturers. So, given that my front axle carries 3620 lbs (or 1810 lbs per side) and my rear axle carries 7980 lbs (or 3990 lbs per side) I think that means my minimum inflation is 45 psi front and 50 psi rear. Does that sound right?

PS. That weight is full fuel, full fresh water, full propane, empty black & grey and one passenger (me).

Ron Dittmer · 06-10-2023, 07:14 PM

Quote:

Originally Posted by CyrusL

So, given that my front axle carries 3620 lbs (or 1810 lbs per side) and my rear axle carries 7980 lbs (or 3990 lbs per side) I think that means my minimum inflation is 45 psi front and 50 psi rear. Does that sound right?

Your numbers are very close to my numbers.

I understand that there is another factor that needs be considered....sidewall folding during hard cornering (while braking hard) of an 11,000 pound rig. So with this consideration, I use a very unscientific method of determining PSI in my low pressured tires. I add 10 PSI to the inflation chart. I run 55 PSI up front and 60 PSI in the rear which is 5 psi lower than what is stated on the door jamb sticker.

Because my front axle is so lightly loaded, I did a suspension modification to reduce the thrashing of the front half of the motorhome. You can read all about it (with pictures) by CLICKING HERE.

rtaggio · 06-11-2023, 09:10 AM

Thanks for posting this inflation chart. If I understand it correctly with my class C weighing in at 4200 front axle, 9700 rear axle (dually) my pressures should be 50psi front and 65psi rear.
Am I misinterpreting this info, cause it seems low ?

Thanks

Capt Steve · 06-11-2023, 11:38 AM

Like Ron I am running the Michelin Agilis Cross Climates on my E-350 {GVWR 11,500#} and have for the last 2.5 years. These tires are awesome and while some might consider them overkill for my smallish Class C the ride and handling are amazing. I run near or even at my GVWR most of the time, often towing a 2,500#{fully loaded} 6 X 10' {8' tall} cargo trailer.

When loaded heavy/towing I run 60 psi on the fronts and 65 on the rears which like Ron, includes a nice 10 percent fudge factor above the Michelin Load/Inflation table. My four duallies are all new and my fronts and spare are 2.5 years old {all Agilis Cross Climates}.

As we live in central Arizona and travel extensively throughout the west a little extra is a very good idea. I have seen temps from 116+ degrees down to -14. I regularly find myself on dirt roads {yesterday comes got mind}, typically Forrest Service which can vary from dry and dusty to mud and snow. I would never own tires for a truck or motorhome that weren't M/S rated.

Between the Michelin's, my HD Bilstein shocks and the Air Lift 5,000# air bags our trusty {currently very dusty} Nexus is holding up nicely as we approach our 10 year anniversary on August first and just turned over 75,000 trouble free miles yesterday.

Works for us.

baraff · 06-12-2023, 09:04 AM

From what I read, this is a voluntary recall. It has little to do with safety but addresses mislabeling of the tire.
The Commercial C tires were made with the Alpine symbol which designates they meet Federal traction requirements for snow tires. Apparently these tires do not. Since I never drive in snow, I'm not going to worry about it.
I had these tires put on in 2020 and have been extremely happy with them.
https://business.michelinman.com/why...all-april-2023

Toyman01 · 06-12-2023, 09:27 AM

My last Class A had 16" wheels. I went with the Sumitomo Encounter HT2 in a LT265/75R16. They are rated at 3400 pounds. I ran them for 4 years and sold the MH to my son. He's still on them. They are a very good tire.

I will be due for tires on the new MH in 2 years. I'll probably put Sumitomo tires on it as well.

CyrusL · 06-12-2023, 11:22 AM

Quote:

Originally Posted by baraff

From what I read, this is a voluntary recall. It has little to do with safety but addresses mislabeling of the tire.
The Commercial C tires were made with the Alpine symbol which designates they meet Federal traction requirements for snow tires. Apparently these tires do not. Since I never drive in snow, I'm not going to worry about it.
I had these tires put on in 2020 and have been extremely happy with them.
https://business.michelinman.com/why...all-april-2023

Yes, I believe that's correct. I wasn't concerned that the tire was unsafe, just that I can't get them and there's no announcement as to when they will be available again. If they were available now, I would have purchased them even with their questionable markings.