Max psi

namusmc65 · 05-17-2018, 06:18 AM

I am wondering if tire pressure could be a problem with my blowouts. The tires call for 80 psi max and that is what I run. However, I have seen them go us as high as 87 on a hot day. Could this be a problem. Should we run lower?

NewBlackDak · 05-17-2018, 06:30 AM

Quote:

Originally Posted by namusmc65

I am wondering if tire pressure could be a problem with my blowouts. The tires call for 80 psi max and that is what I run. However, I have seen them go us as high as 87 on a hot day. Could this be a problem. Should we run lower?

The max PSI indicated is for cold max inflation. They take into account higher pressure from heat during towing conditions. You are more likely to have a blowout due to under inflation than over. Cheap tires are also more prone to blowouts.
One thing to note is that most trailers are close to the load capacity edge on tires. When you lose one on a side it immediately overload the other, and it’s prudent to replace them both.

TWP723 · 05-17-2018, 06:31 AM

Speed could be a factor also. Faster you go, the hotter the tire.

**norty1** · 05-17-2018, 06:44 AM

Rising cold temps are normal.
How much depends on the ambient temp, the tire load and speed, road conditions, etc.

bigironcoder · 05-17-2018, 07:54 AM

Don't overlook the valve stems. I've been told by tire dealers that OEM trailer rims often have cheap stems that can't handle high temps and pressure. The time it happened to me, the stem looked normal until I bent it. Trouble is the stem deflates the tire in a matter of seconds and the tire gets destroyed, making it look like the tire was to blame. Tire dealers almost always put new stems on with new tires, so no one is the wiser.

mtdawg · 05-17-2018, 08:13 AM

One other factor may be tire rating. Our North Point had E rated tires, but at almost 14k we were told that we probably needed to move up to and F or G rated tire. Our Pinnacle has G rated tires and we have had no problems.

Jim

goducks · 05-17-2018, 09:23 AM

All tires increase in PSI as you drive them. Thats why you only fill them when cold. It's normal.
What tires are you using?
How fast are you towing?
How much weight is on the tires?

bankr63 · 05-17-2018, 11:15 AM

If your TT is not near the tire's load capacity limit, and you tow in really hot conditions (i.e. Arizona/Texas summer) you may want to consider reducing pressure a bit.

Check your tire manufacturer's website (assuming a good name brand tire like Goodyear or Maxxis) for the tire loading chart for your tire model and size. At 80 psi your trailer can carry the maximum weight listed. At lower pressures, the carrying capacity is slightly reduced, but as long as it is higher than the load you are actually placing on it, that's okay.

I know of a couple of folks who claim to have stopped blowout problems that seem to occur on really hot days in the deep south by dropping the tire pressure slightly and safely (within the limits recommended by the manufacturer).

bigironcoder · 05-17-2018, 11:29 AM

Another thought occurred to me - I've been lucky to have had only 2 blowouts on the road. But in both cases, it was the side of the trailer facing the sun on sunny days. Maybe coincidence, maybe not.

**norty1** · 05-17-2018, 01:35 PM

I went thru 2 sets of Goodyear Marathon LR-E on my rig.

I upgraded to LR-G fours years and have not had any tire problems since.

namusmc65 · 05-18-2018, 05:47 AM

I was running Gladiator tires this last time I had a blowout. I am now running Goodyear Endurance St235/80R16 at 80 psi. The tires are speed rated for at 87 MPH I do believe but I tow at 65-70 max on the interstate, about 55-60 on the two lane roads. Speed and tire pressure should not be a problem. The Gladiator blowout occured after only about 45 minutes on the road. We had just left camp for home. Weight was suggested as a problem but the gvwr on the Jayco is 11,995 pounds. My actual weight on both axles was 9,240 so I was well under on the weight. 6,000 pound axles so should have supported up to 12,000 lbs, no problem.

namusmc65 · 05-18-2018, 05:48 AM

Quote:

Originally Posted by norty1

I went thru 2 sets of Goodyear Marathon LR-E on my rig.

I upgraded to LR-G fours years and have not had any tire problems since.

Did you change rims as well. I can't seem to find out what tire pressure these rims are rated at!

skijlw · 05-27-2018, 12:31 AM

My tires run about 6 degrees above the outside temperature when it is above 50 degrees. The tires on the sunny side will run a couple degrees warmer. I am running Maxxis tires now and they run a lot cooler than my previous tires which were Towmax and Goodyear Marathon.

kevin · 05-27-2018, 08:46 AM

We just started full-time rving with a used 2010 Jayco Eagle FW. I replaced three tires off the bat for bad stems. Two on the same side and the spare all looked like they had been at the beach sunning to long and I wasn't sure of the history so better safe then sorry. They all had bad stems. I watch like a hawk using a tire monitor. During a brake repair I figured it prudent to replace the remaining two tires and the next day had a bad stem issue on one. Now as stems crap out I'm replacing with the metal version. I keep my tires at 70 psi, have a dual axle, usually weigh in at just under 12k on the trailer never go much over 60mph because my understanding is that ST tires are rated for 65mph, and no blow outs yet (knock on wood) but as the song goes "we've only just begun". http://RVing.website

vcbice · 05-30-2018, 09:59 AM

If you are using stem mounted TPMS sensors then you really should get all metal stems. Rubber ones, or the half rubber, half metal ones, will fail due to the extra flex caused by the sensors. I like having metal valve stems on any wheel.

Best way to avoid blowouts is good tires, lower speeds and proper inflation. With Maxxis and Goodyear making decent tires I'd never use any other brand. I replaced brand new Rainier tires with Goodyear Endurance.

Mr&MrsSmith · 06-06-2018, 06:12 PM

We run about 65PSI cold and live in AZ. I have found this PSI is just right as they reach 70+ rather quickly. I monitor our PSI while travelling and have found this works for us. New tires are on the horizon though as the ones we have came on the unit in 2015. I am told they should be replaced at about the 3-4 year mark especially with the abundance of sun we have here.

**norty1** · 06-06-2018, 06:45 PM

Quote:

Originally Posted by namusmc65

Did you change rims as well. I can't seem to find out what tire pressure these rims are rated at!

No, fortunately my rims were rated at 3750 and 110 psi. Both are stamped on the inside of one of the rim legs. I rum mine at 100 psi.

Sk734 · 06-07-2018, 06:07 AM

Quality of the tire and how fast you tow has alot to do with longevity. Always check tire pressure before you head out. Also look the tires over for bulges and cracks in the rubber. I change my tires at 4 years or less-never had a blowout. Many thousands of miles fulltiming. Now just 1/2 timing. Happy camping

Mr&MrsSmith · 06-07-2018, 06:54 AM

Quote:

Originally Posted by Mr&MrsSmith

We run about 65PSI cold and live in AZ. I have found this PSI is just right as they reach 70+ rather quickly. I monitor our PSI while travelling and have found this works for us. New tires are on the horizon though as the ones we have came on the unit in 2015. I am told they should be replaced at about the 3-4 year mark especially with the abundance of sun we have here.

I forgot to include that we have the stock Rainer Tires that are marked at a cold PSI of 70.

ducati3 · 06-07-2018, 09:31 AM

What brand tires, our white hawk was shipped with Chinese tires, and developed major problems, bubble on the sidewalk, within 2,200 miles. Had Camping World install Goodyear Endurance tires.

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