Tire pressures

[F350guy]

Jetlag, I think you are right about the truck payload. My sticker says 80 psi for the rear and 60 for the front. They stay there. The sticker is saying if you have this much pressure in your tires you can carry the weight listed on the yellow sticker.

Someone on this forum ordered a Pinnacle 32RLTS, I think, with the 17.5 wheels and Goodyear G114 tires as an option. I wonder what pressure they are running. I would think max pressure would make it ride like an iron wheeled wagon.

I'm still thinking about going with a 14 ply load range G tire for our Pinnacle. Our Endurance are 4 years old, not aged out yet, but the wife has shown me several posts on the Jayco Facebook page with folks having their Endurance tires explode. I do understand the Endurance have the capacity needed for our Pinnacle but I've run 14 plies on previous fifth wheels with absolutely no issues. Also had no issues with our Endurance tires on the Pinnacle so it's probably more of a want, not a need. I've run the tires at 70 psi since we bought the Pinnacle, which is still more than I need according the load chart. They look good.

[jetlag]

Originally Posted by F350guy

Someone on this forum ordered a Pinnacle 32RLTS, I think, with the 17.5 wheels and Goodyear G114 tires as an option. I wonder what pressure they are running. I would think max pressure would make it ride like an iron wheeled wagon.

I'm still thinking about going with a 14 ply load range G tire for our Pinnacle. Our Endurance are 4 years old, not aged out yet, but the wife has shown me several posts on the Jayco Facebook page with folks having their Endurance tires explode. I do understand the Endurance have the capacity needed for our Pinnacle but I've run 14 plies on previous fifth wheels with absolutely no issues. Also had no issues with our Endurance tires on the Pinnacle so it's probably more of a want, not a need. I've run the tires at 70 psi since we bought the Pinnacle, which is still more than I need according the load chart. They look good.

My buddy with same Pinnacle as mine, en route to Alaska, blew one. had them all replaced, but can't remember the brand he chose. I am guessing the G114 tires are not an option unless changing rims?

[F350guy]

Originally Posted by jetlag

My buddy with same Pinnacle as mine, en route to Alaska, blew one. had them all replaced, but can't remember the brand he chose. I am guessing the G114 tires are not an option unless changing rims?

I did an edit and agreed with you on the tire pressure on your truck. The G114's don't come in a 16" size, only 17.5. They were an option a while back but when I looked recently at the Pinnacle website the only option listed was disc brakes.

[TaftCoach]

The tire manufacturer produces tires for a wide range of vehicles and trailers. They publish a number that lists the maximum pressure. Much like your TV has a max tow and payload rating.

The trailer or vehicle manufacturer establishes a pressure for their vehicle or trailer. If that number is below the max then that tire would work for you. If it is higher, you will have to buy a different tire.

If you can master tow capacity, you can master tire capacity.

[Kevin Cooper]

This is Goodyear RV tire information link. https://www.goodyearrvtires.com/pdfs...guide-2022.pdf

It states the reasons you do not want overinflated tires. For clarity of my original question, is Max air pressure more dangerous when not called for. Yes and no. The No is that max pressure does not increase chance of blowout, at least not stated. Treadwear, stability, braking, and control are issues.
Read the attached if you want their expertise. Respectfully to all, Kevin

[ajef7885]

Just put new Carlisle radial trails Load D on our bumper pull. It had load C from the factory. Carlisle has charts showing the recommended cold PSI by load. For our trailer 55 PSI is correct for the load we have. If I ran max psi I would probably have two problems 1. center tire wear from bulging, 2. a ride that would send everything inside flying!

[Kevin Cooper]

Originally Posted by ajef7885

Just put new Carlisle radial trails Load D on our bumper pull. It had load C from the factory. Carlisle has charts showing the recommended cold PSI by load. For our trailer 55 PSI is correct for the load we have. If I ran max psi I would probably have two problems 1. center tire wear from bulging, 2. a ride that would send everything inside flying!

You would also, according to Goodyear have less braking, and more likely tire damage when hitting pit holes.

[GarlicDude]

So very tired of tire pressure questions and answers!

[ajef7885]

How would that be? Its a higher load rated tire at its optimum pressure?

[ajef7885]

Why do they print a Load vs PSI if they want you to run them at max sidewall? Just like your tow vehicle, you match air pressure to the load. https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf

[Camp CA]

I have inflated trailer tires to max cold tire pressure on all 4 fifth wheel trailers since 2004 without an issue. Currently inflated to 80 psi on our Goodyear Endurance ST255/85R16 E (10 ply) tires. Trailer has it own TPMS but I also have TireTracker external sensors that monitors tow vehicle and trailer 10 tires while traveling. You can expect a pressure rise above the cold set pressure while towing but no need for concern. Underinflating is the biggest risk of a blowout IMHO.

[Kevin Cooper]

Originally Posted by Camp CA

I have inflated trailer tires to max cold tire pressure on all 4 fifth wheel trailers since 2004 without an issue. Currently inflated to 80 psi on our Goodyear Endurance ST255/85R16 E (10 ply) tires. Trailer has it own TPMS but I also have TireTracker external sensors that monitors tow vehicle and trailer 10 tires while traveling. You can expect a pressure rise above the cold set pressure while towing but no need for concern. Underinflating is the biggest risk of a blowout IMHO.

So, after running them for 20,000 miles, is the tread depth across the tire even? I’m sure that running the tires the same pressure all the time will eventually make them full tread on the highway with hood traction and braking again. How many miles do you have on them when you change them?

[TaftCoach]

Originally Posted by GarlicDude

So very tired of tire pressure questions and answers!

Tired indeed.

[Kevin Cooper]

Originally Posted by TaftCoach

Tired indeed.

What exciting things have you brought up? Maybe since I’m not as experienced, I might enjoy your question. Respectfully,

[Camp CA]

So, after running them for 20,000 miles, is the tread depth across the tire even? That would be a good test to report on.

How many miles do you have on them when you change them? Depends, as I replace trailer tires every 3-4 years......cheap insurance.

[Kevin Cooper]

Goodyear did reply to my request. They sent the link for charts of RV tires, loads, pressures. No other comment.

[Kevin Cooper]

Originally Posted by ajef7885

Why do they print a Load vs PSI if they want you to run them at max sidewall? Just like your tow vehicle, you match air pressure to the load. https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf

Thanks for the personal comment!

[daveswanson]

Murff provided the same information on 6/17/23. It matches what they sent Kevin.
Those of us who run Goodyears that were sold or installed by a knowledgeable dealer provided us that document and we use it.

[hotrod51]

Originally Posted by Kevin Cooper

I have asked Goodyear if they could share any information, thoughts, or feelings about running RV 100% of the time at Max pressure from sidewall regardless of the weight on the tires. Hopefully they can give their opinion.

I have a in at Goodyear Engineering. I found my trailer tail wiggling. I. He told me that max PSI may be creating my problem did the 65PSI and hit the road. when I told my contact what the trailer was doing. He told me max psi may be the problem as well as creating excessive tire wear. Although the tires are rated for 65PSI use the recommended tire pressure for that trailer. If you dig you can find the proper pressure each individual tire built and proper inflation for the GCWR. My GCWR for my trailer is 7000 pounds and for that weight based and their charts is 50#, the plate on the trailer is 50#. Kinda funny how that works.

[Kevin Cooper]

Hotrod, The response to my questions was a link to the chart PDF showing pressures and weights. The RV manufacturers know what their RV s weigh and what tires they use. They use the tire manufacturers information says. They do not re-engineer that information. So, bottom line, you are suggesting use of MaxTire pressure always is not advisable.