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Old 06-07-2016, 07:33 PM   #61
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Originally Posted by Tireman9 View Post
Herk
Main concern is to not exceed the load rating of the wheels.

I have heard it said that it is possible to exceed the psi rating and probably not get failure but exceeding the load rating is almost certain to fail the wheel.
That was my understanding as well.
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Old 06-07-2016, 09:36 PM   #62
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Old 06-08-2016, 08:23 AM   #63
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When I bought my Goodyear UniSteels to replace the TowMasters, I also asked about the Sailuns due to the cost of the Goodyear. My tire dealer did not recommend Sailuns - said they were more of the same if not worse. Look at the weight of the tires, good tires weigh considerably more IMO.
I agree with reporting the failed tires but in most cases, when tire failure happens, you are on the road to somewhere and just want to get back on the road and get rid of the bad memory. After all, this just ruined our vacation or our return trip home. If the NHTSA really cared, they would be testing these tires and seeing them fail at an unacceptable rate without us having to go through all the pain.
Have to wonder if the dealer that said Sailuns were no good sells then. Might he simply be badmouthing a competitor?

NHTSA is under budget constraints thanks to Congress, so they have to prioritize and in general all tires are low on the list of items they try and monitor (air bags, seat belts, child seats and any other "safety related item on motor vehicles.
Due to low failure rates of tires and even lower personal injury rates and further down would be fatality rates of less than 1 in 100,000 or fewer complaints.
NHTSA also knows from previous and ongoing data collection that over half of RV owners have one or more tire in overload with most of those due to poor maintenance and low air pressure.
Another issue is that if they only have a few actionable complaints on file how can they justify spending $$ on testing that specific tire. Which one brand and design and size would you advocate spending $30 to $100 thousand on for the battery of tests?

A couple years ago I some time researching and reviewing complaints on file that might have been from RV owners.
What I found were a lot of "sob stories" but very few facts. Less than half had a proper size i.e. "My 205-15 tire failed".. A smaller percentage had the complete DOT serial. Some said things like "My Firestone Marathon tire exploded while on our trip to visit my mother who was sick". Sorry but trip information is on no value and if the complainant can't be bothered to know the brand and design of the tire how can they trust the rest of the information.

Complaints do not need to be long but they really need one thing it's the COMPLETE DOT serial including date code at end. I have advocated that people collect and write down this information before there is a tire problem and keep that info with the rest of your important RV documents. The DOT serial is also used if/when there is a recall so you would need to know the serial to know if your tires are subject to recall. Yes there have been recalls that involve tires that are on RVs.

I do understand that people want to get back on the road but at a minimum would be to capture a couple pictures of the failed tire (tire filling entire frame is best). NHTSA may or may not ask for the pictures in follow up but if you don't even have a couple of pictures exactly what evidence are tou bringing to the table?
You should also try and carry a trash bag large enough to carry the failed tire back to the dealer if you don't have spare tire rack. In reality the dealer is suppose to file a complaint with his distributor so that information can be sent on to NHTSA but sometimes I wonder if they bother so it really is up to us, the users to file the complaint.

Sorry for long post but wanted to use this as a bit of general education.
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Old 06-08-2016, 08:57 AM   #64
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I've seen more than one person in this thread talking about only putting 65 psi in the E rated 80 psi tires. This confuses me.

Doesn't under inflation lead to failure?

I've got 2 of the new tires on the trailer, the other 2 are in my truck so I can take them to the tire store here in a minute. I'm wore out from pumping the jack handle.
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Old 06-08-2016, 09:34 AM   #65
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Under inflated for the load. Look at a load inflation chart to get the minimum psi required for the given load. Anything above that is not under inflated. Some people may disagree with that, but tire companies publish load inflation charts for a reason.


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Old 06-08-2016, 09:43 AM   #66
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Under inflated for the load. Look at a load inflation chart to get the minimum psi required for the given load. Anything above that is not under inflated. Some people may disagree with that, but tire companies publish load inflation charts for a reason.


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I haven't found a load inflation chart on Carlisle's website yet, but I did find this there:
What is the proper tire inflation?

Maintain air pressure at the maximum PSI recommended on the tire sidewall. It's best to check tire pressure with a quality tire gauge when tires are cold and in the shade.

Under inflation is the number one cause of trailer tire failure. An underinflated tire creates abnormal tire flexing and excessive heat causing:

  • Ride and handling problems
  • Decreased fuel efficiency
  • Reduction of tire life

Driving on tires with too much air is also not recommended. Over-inflated tires are more likely to cut, puncture or fail by sudden impact.
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Old 06-08-2016, 12:42 PM   #67
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I'll just bump this up by saying I have my other 2 new tires in the back of my truck and need to get out there and put them on.
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Old 06-08-2016, 01:14 PM   #68
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Originally Posted by KingFisher View Post
I haven't found a load inflation chart on Carlisle's website yet, but I did find this there:
What is the proper tire inflation?

Maintain air pressure at the maximum PSI recommended on the tire sidewall. It's best to check tire pressure with a quality tire gauge when tires are cold and in the shade.

Under inflation is the number one cause of trailer tire failure. An underinflated tire creates abnormal tire flexing and excessive heat causing:

  • Ride and handling problems
  • Decreased fuel efficiency
  • Reduction of tire life

Driving on tires with too much air is also not recommended. Over-inflated tires are more likely to cut, puncture or fail by sudden impact.

From the same web site ...

"How fast can I travel on Carlisle trailer tires?

In the past, most trailer tires were rated at 62 or 65 mph. Today, some of our tires are "rated" (speed symbols) at 87 mph (N), some at 75 mph (L), some at 65 mph (J: ST tires) and some at 62 mph (J: non-metric tires).

Please remember that speed ratings are test speeds and not recommended driving speeds. The ratings apply only to the tire itself, and not a particular vehicle. The speed rating does not mean that the vehicle can be safely operated at the tire's rated speed.

We recommend driving no more than 60 mph when towing a trailer. Please always drive at a safe speed and abide by the posted speed limit."


This is all legal mumbo Jumbo (their C rated tires are notorious for early failures). There are load charts even for Carlisle tires; they just don't choose to publish them any more because most folks don't weigh their campers. You have no idea what the optimum pressure is if you don't weigh your axles.

Because of that fact, they only warrant their tires now if you can PROVE you inflated them to the maximum sidewall pressure. Good luck with that ...
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Old 06-08-2016, 01:25 PM   #69
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All ST tires follow the same load inflation chart. Easy to find one. An 'E' rated tire has the same load rating at 65 psi as a 'D' rated tire at 65. The tire is there to hold the air, and it is the air that supports the load. The tire doesn't care whether it has 8 belts or 10 belts, just that it has enough air to support the load.

Put 80 in your new tires if you think it is necessary.


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Old 06-08-2016, 01:32 PM   #70
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Originally Posted by lbrjet View Post
All ST tires follow the same load inflation chart. Easy to find one. An 'E' rated tire has the same load rating at 65 psi as a 'D' rated tire at 65. The tire is there to hold the air, and it is the air that supports the load. The tire doesn't care whether it has 8 belts or 10 belts, just that it has enough air to support the load.

Put 80 in your new tires if you think it is necessary.


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That makes sense, I can wrap my head around it.

Thanks.
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