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Old 08-08-2012, 09:16 PM   #113
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We have had a problem where we cannot drive 300 miles without a tire separating. We have tried GY, TowMaster, and Carlisle, load D and E. The street rear separates first, followed by curb front and street front. We keep the tires at 65, even for the 80 psi tires.

We've replaced 30+ tires in 8 years. On our last trip to San Diego, we had one tire separate in route, replaced 3 tires upon arrival, and replaced two tires when we got home. This began happening within a year of purchase. We have had one double blowout, curb rear and street front. I've posted images of the separating tires in:
http://www.airforums.com/forums/f438...ain-45428.html
http://www.airforums.com/forums/f42/...day-15566.html

We have the wheel bearings packed every 15k. Brakes are good.

We had given up on using the our Classic because we cannot solve the problem. So we took the trailer to N Dallas RV. We had a brand new Carlisle on the street rear when we departed. 225 miles later, the brand new tire was separating.

Randy checked the alignment - all was OK. The shocks are ok, and we have never had the banding indicating excessive bouncing. Randy checked the Hensley alignment - all OK. As a last repair option, we are replacing our 4200 lb axles with new 5000 lb axles. After this, the only options are to use another hitch and get a different tow vehicle.

I wish someone had an answer as to why our trailer is blowing tires so quickly.

What can be the cause - just like you are experiencing ?????

73/gus

This is crazy. Sorry you have had so many problems. I have no advise for you but will be interested to see the outcome.
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Old 08-08-2012, 09:44 PM   #114
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The most common reason for tire separation is LOW tire pressure. While I am not saying over inflate the tires to 80 lbs as many will advise I would check your running pressure against the inflation chart.

http://www.goodyearrvtires.com/pdfs/rv_inflation.pdf

If you are within the range for your weight the next thing I would check are the rims. They may have poor contact surfaces with the tire bead and loosing air or they may be cracked. If you have tires on the trailer i would start out with known pressure in them and drive about 15 or 20 miles. Then check the pressure. It should be above the starting pressure. If lower you have a leak. If the pressure is OK drive another 20 miles and check the temperature of the tires. They should only be warm to the touch,105 to 110. If you can't hold on to them they are separating and the pressure is most likely higher than before.

Having had this problem with several tires I would look closely at the rims.

Changing the axles will have no effect on the tires.

Another possible point of heat would be bearings or brakes. After driving 20 miles or so on open road come to a stop without using the trailer brakes. Check the hub temperature but be careful because if the brakes or bearings are the problem the hub will be very hot. Approach the hub with your hand and if you feel heat before you can touch them there is a problem. That heat will make its way to the tires and overheat the tires.
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Old 08-08-2012, 09:52 PM   #115
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Gklott,

I think you may be the unlucky winner in the tire replacement category.

It sounds like you are a candidate for 16-inch wheels and XPS Ribs; but there must be something else going on with your Airstream, as your failure rate is almost unbelievable. Before switching tire brands, types and/or sizes, I would wait until someone figures out the cause. Hopefully, you purchased the Discount Tire extended warranty and haven't had to pay for all of the replacements.

Are new electric brakes included in the axle replacement?

Good luck -- We anxiously await the outcome of your first post-repair roadtrip.

=============

Note: Would appreciate your input to the poll below, if and when you can spare a few minutes. --Thanks!

http://www.airforums.com/forums/f438...oll-76867.html
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Old 08-09-2012, 07:44 AM   #116
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We carry a compressor with us, measure each morning, and the three TowMaster tires we replaced on the last San Diego trip were all loaded to 78 lbs. That's when we went back to 65 lbs, the AS recommended fill, and what Discount Tire recommended. That didn't change the outcome.

We buy the tire warranty each time, so the out-of-pocket cost has not been that great.

The rims are something that we have not examined that closely. However, when the street rear tire failed on our last 350 mile trip to Balmorhea State Park, we returned on the spare, which is rarely used. The spare, on the steel rim, also separated by the time we got back.

On the weight, we are well within the weight limits. last weight:
Classic tongue = 950
Classic 2 axels = 7480

Concerning the bearings, we had the original recall for the bad grease by AS. Since then, we've had the bearings repacked at regular intervals. Several separate dealers have told us all is OK. Don't know what to say there.

We also have had the brakes checked. Randy checked for this, and he said our brakes look good. Have a Prodigy controller. We will raise the bake point again, and replace if there is any question it could be the cause.

We've done everything "right", with multiple AS dealers for repair, and it still happens. It's much cheaper to replace everything underneath than replace the trailer.

Believe we may go to the 16" wheels and other tires this time too. That's why I read this thread with great interest.

73/gus
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Old 08-09-2012, 07:46 AM   #117
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We are going to have new electric brakes installed too. We have about 120,000 miles on the trailer.

Like the XPS ribs, which is what we have on the truck. great tires.

73/gus
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Old 08-09-2012, 08:46 AM   #118
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Do the road test to check the brakes and bearing before spending a lot of money. There are brake systems out there that only have one return spring on the shoes and they have a tendency to not release after application and heat the drums.

You have a problem of over heating or low pressure and just replacing axle parts, unless it is the rims, will not solve the problem.

Look at your bills from the time you have had the bearings repacked. If you do not see a charge for new seals they did not do the job right. A common thing now days to shorten the time and improve profits.
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Old 08-09-2012, 09:05 AM   #119
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We are starting new beneath the trailer. Replacements already underway.

Tires blown at 65 psi on "D" tires, 80 psi on "E" tires, and 65 psi on "E" tires. We check every day when traveling.

Receipt for last 2 bearing repack service are fixed price, $$$ for each bearing. Does not itemize parts.

We are scared to use trailer as is, and we will be satisfied when all is anew.

Figure 8 years and 120,000 miles is not a bad investment time given the crazy high prices for today's AS.

73/gus
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Old 08-09-2012, 09:23 AM   #120
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We check every day when traveling.
When do you check? Before starting and then after some travel time? Do you ever have to add air on the second or third day on the road?
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Old 08-09-2012, 10:29 AM   #121
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Check tires every morning before departing. Also have a Doran tire pressure monitoring system, which we "calibrate" before departing on each trip. We check that periodically during the day. That's why we have not had any more catastrophic blow-outs.

73/gus
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Old 08-09-2012, 10:36 AM   #122
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The Doran system. Does it only check low pressure? Some systems also check high pressure. I have got to believe the pressure is going up before separation if you have eliminated low pressure with a tire monitor system.

I had a Fleet Specialties System on my rig for a short period but the false reports were a pain and I removed it.
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Old 08-09-2012, 10:49 AM   #123
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Doran measures and reports actual pressure, numerically. It alarms at lower pressure, loss of pressure, and high pressure.
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Old 08-09-2012, 11:20 AM   #124
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We are going to have new electric brakes installed too. We have about 120,000 miles on the trailer.

Like the XPS ribs, which is what we have on the truck. great tires.

73/gus
As long as you brought it up, I have decided to do the 16" conversion. My only decision left to be made is which tires. I would like to hear some pro's and con's of the XPS ribs vs the LTX. At this point, I like the XPS and am aware they are more expensive. I just want to be sure that I'm not paying the extra for no added benefit. If this has all been hashed over before, an link to that would be sufficient.
Thanks,

Ken
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Old 08-09-2012, 12:23 PM   #125
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Quote:
Originally Posted by gklott View Post
We have had a problem where we cannot drive 300 miles without a tire separating. We have tried GY, TowMaster, and Carlisle, load D and E. The street rear separates first, followed by curb front and street front. We keep the tires at 65, even for the 80 psi tires.

We've replaced 30+ tires in 8 years. On our last trip to San Diego, we had one tire separate in route, replaced 3 tires upon arrival, and replaced two tires when we got home. This began happening within a year of purchase. We have had one double blowout, curb rear and street front. I've posted images of the separating tires in:
http://www.airforums.com/forums/f438...ain-45428.html
http://www.airforums.com/forums/f42/...day-15566.html
On a hot weather trip from Tucson Az to Fort Lauderdale Florida, we had three blowouts on the way with ST tires, one of them with a tire purchased 300 miles up the road. Two of the blowouts were GYMs, the other was a no name oriental "Tow Crap" which was all I could get in a small town tire store.
Hot weather + freeway speeds + ST tires= blowouts. You can check your air pressure every 20 miles, balance your wheels, install centremics or what ever they are, it makes no difference ST tires are going to blow on a long freeway trip in hot weather.
I went with 15 inch Michelin extra loads but my rig is lighter than yours (6300). As other posters have suggested, upgrade to 16 inch wheels and load range E LT tires. Your blowouts will be a thing of the past. That is a better idea than not using your trailer.
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Old 08-09-2012, 03:03 PM   #126
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Doran measures and reports actual pressure, numerically. It alarms at lower pressure, loss of pressure, and high pressure.
Are you saying that the Doran gave NO INDICATION of pending tire failure before the tire separated? I would surely call them and ask for an explanation.
One tire might just be a fluke but after the second or third questions should be asked.

As I mentioned I removed the Fleet Specialties System because it gave a false readings on every trip. Your seams to have gone the other direction with no readings at all when there clearly as a pending problem. Separation produces heat and heat produces a increased pressure, one of the first laws of physics.

Please continue to report as all will benefit from this.
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