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Old 07-20-2016, 11:52 AM   #71
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Originally Posted by jcanavera View Post
In addition I really think that the life limiting factor for ST tires is the speed restrictions, and the combination of weight of your trailer and length of time that your ST tire is in use.
I agree! Since industry standards dictate tires with the ST designation are speed rated to 65 MPH (104 km/h) under normal inflation and load conditions, my opinion is the majority of the failure rate for ST tires is reflective of use greater than 65. And that is my opinion.

Since that is an industry standard and max speed limits are no longer 55. Owners drive the speed limit + a little.

Why an ST continues to have that standard is a different discussion. However that is the standard today. So given that higher speed means more heat. More heat is a negative factor in tire life.

I have no facts or studies to back that up. It is just my opinion. So if that opinion were correct, reported ST tire failures may be greater than other tire types because of speed.

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Old 07-20-2016, 01:35 PM   #72
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Industry standered is to have a minum speed rating of 65mph but most st rated tires have an m or n speed rating which is 81 or 87 mph. My Carlisle radial hd tires do great at 75 mph I plan on upgrading the tires on my other trailer to them as well.
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Old 07-20-2016, 03:45 PM   #73
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I went to a tire safety training program and we spent some time on speed ratings. The issue in many cases is the ability of the tire to dissipate heat and the ability of the tire to not degenerate and separate as it heats up. The flexing of the tire as it rotates naturally generates heat. The faster the rotation the higher the heat. Added to that, inflation pressure will also minimize the amount of flex as the tire touches to pavement and bears the weight. If you drive faster than the rating of the tire, you are rolling on a ticking time bomb. Again add to that the temperature of the pavement, the surrounding air and tire inflation.

Think about the fact that Airstream states that you can tow a tandem trailer with 3 tires. But note it is at a reduced speed. The reason is that a tire rotating more slowly can carry more weight due the fact that the tire is generating less rotational heat.

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Old 07-20-2016, 05:11 PM   #74
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Old 07-21-2016, 08:47 AM   #75
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Even with the better tire 70 is too fast for towing a trailer.
Going 65 increases space in front of your vehicle therefore increasing reaction time and stopping distance.
These rigs don't stop on a dime even when in perfect mechanical repair.
Also, going 65 mph vs. 70 mph saves a lot of fuel.
I'll go slower if it gives my back pocket a break.
At the end of the day, going 65 mph vs. 70 mph doesn't change your day that much.
Even if driving 10 hours it will only add one hour to your day.
Who's driving 10 hours?
A shorter drive/shorter day only amounts to a few minutes going 65 rather than 70.
I would never say I'd rather not have a trailer of I have to go 65.
I tow at 60-65 mph all the time everywhere regardless if the speed limit is 70, 75, 80, or 85.
They can all go around me and admire my shiny silver trailer as they pass.
Whatever floats your boat friend. I was expressing my preferences and feelings towards the restrictive nature of the ST tires not attempting to convince you to change your ways.
As to safety with a 7,500 LBS Travel trailer on the road, I have 35 years of owning, driving and managing Semi Tractor trailers under my belt. So if you see me pulling around you at 70MPH on an open Interstate don't panic I know what I am doing.
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Old 07-21-2016, 09:02 AM   #76
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I still say with 1,000,000 miles under my belt that 65 mph is better for following distance, reaction time, and fuel savings.
You're grown and can do as you wish.
We don't have too many open interstates.
There are always cars around.
Cars with untrained, uneducated, possibly uninsured and unlicensed, and many just simply don't care.
I am not protecting myself against you.
I am protecting myself against them.
How many trailers have you seen with improper weight distribution and sway control zoom pass you whipping side to side all the way down the highway?
I've seen plenty of those.
My truck 'n' trailer, my choice-
Your truck 'n' trailer your choice-
Your 80,000# 18 wheeler by design may handle better in some ways than a pickup truck and travel trailer- purpose built- designed to handle 80,000#- designed to actually brake better under load-
Many over the road trucking companies have a self-imposed speed limit of 65 mph to increase following distance, increase reaction time, and save fuel.
I am more likely to see that deer in the road and slow or stop at 65 mph than at 75 mph.
I do understand that most people just simply don't want to hear it...
To each his own.
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Old 07-21-2016, 12:26 PM   #77
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>>>>>>>>>>>>Mod post<<<<<<<<<<<<<<<

You have both stated your opinions more than once. Neither of you will are going to convince the other to change opinions. So please stop posting the same opinion over and over again because that will result in posts removed, thread closed and possible action that you will not care for.

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Old 07-26-2016, 08:22 PM   #78
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Originally Posted by Timberock View Post
The TST TPMS that we use is factory set to 157 degrees. When traveling through the southwest and California last year we did observe temperatures in the 115-120 range with outside temps being 100-103 degrees. With the new tires and after hearing others share their feedback I have started to research where to set the temperature alarm to get an earlier warning.
When stating temperatures from your TPMS system, make sure you state whether the sensors are internally or externally mounted.

External TPMS sensors are out in the air stream and as such, will report a lower temperature than internally mounted sensors.

See the following article which discusses tire temperature monitoring and why TPMS temps are not accurate.


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Old 07-26-2016, 08:59 PM   #79
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Whatever floats your boat friend. I was expressing my preferences and feelings towards the restrictive nature of the ST tires not attempting to convince you to change your ways.
As to safety with a 7,500 LBS Travel trailer on the road, I have 35 years of owning, driving and managing Semi Tractor trailers under my belt. So if you see me pulling around you at 70MPH on an open Interstate don't panic I know what I am doing.
Well now I been driving big trucks pulling big trailers for 48 years , my own, and travel trailers since 1971, and I pull my 13 31' classic coast to coast at 63 mph, and I have no problems with any one passing me, my last KW with 4 axles pulling a 3 axle pup grossing 100000 lbs. had 1.4 million miles and the head has never been off...and I have seen quite a few in the ditch.....
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Old 07-30-2016, 05:02 PM   #80
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I find 70 MPH a very comfortable and safe speed with an Airstream. If I have to drive 65 MPH or less I rather not own a trailer. I would go crazy being confined to driving 65 MPH or less. Had I not had the option to go to a better tire I would have sold the trailer.
Airstream factory installs 16" wheels and Michelins on their so called "Premium" trailers, Classic, Pendelton and Eddie Bauer which I find ironic because in comparison to other brands everything Airstream makes is premium priced. All their trailers should come with them from the factory and make the tire issue disappear from Airstreams.
I don't feel comfortable going 70 even when driving the truck with no trailer. With the trailer I am even slower, 60 or maybe 65 downhill. I must be old! Remember the old days when 55 was the speed limit, and 65 was speeding? I still feel that way, even with everyone passing me. And I mean everyone. School buses pass me. Oh well.
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Old 07-30-2016, 05:35 PM   #81
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Since I started lugging a travel trailer and finding out how they are built, I now try to keep as much distance as possible away from any that I see flying down the road.
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Old 07-30-2016, 06:31 PM   #82
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I think what slowed me down was an experience about 15 years ago when I was towing my 22' Hi-Lo on an Interstate on the way to Destin.

An 18 wheeler ahead of me blew two tires on the trailer and sent chunks of tread flying towards me. No other vehicle was in front of me and I was doing 55 mph. I had some decent space between us both but as the tire chunks went flying, I had to do some severe swerving to keep from hitting the large tire carcass parts. I was using no sway control and was towing my Hi-Lo with a '73 Oldsmobile Cutlass. There was no time to think and every move I made was pure reaction on my part. On one swerve the Hi-Lo yawed big time into the left lane and a guy who was in the process of trying to pass me was actually forced on to the left lane shoulder as the trailer swung out in front of him. The trailer then yawed back to the right. Then the trailer yawed back to the left but less than half the arc I had seen earlier. I was applying the trailer brakes though out the incident and stayed off the brake pedal.

The yaw dissipated within 3 cycles and I had burned off enough speed to easily get around the rest of the road debris. I went to the shoulder and stopped. I just sat there shaking and was grateful that we didn't get hit or lose control. I opened the door on the Hi-Lo in it's normal travel collapsed mode, and saw that every cabinet had opened and everything was on the floor. I checked the hitch the tow bars and chains and found every thing fine. I only think I got me through this was the low profile of the Hi-Lo, the Henschen tandem torsion axles, and the fact that I manually used the trailer brakes.

In retrospect I realized that my slower speed allowed me to make some fairly severe swerves. It also allowed the trailer to more quickly burn off the speed. It also reenforced the need to stay back from those 18 wheelers, especially when they pass you and pull over in front of you. Yes you have to drop back in speed but you need that distance cushion. If I had been closer and driving faster, I doubt I could have made the corrections in time to miss the flying tire carcass. I also realized that a sway control might have helped.

I've become a firm believer that as safe as you may be as a driver, increases in speed require faster reaction times if events occur. The difference in avoiding accidents has a lot to do with your ability to react to the conditions at hand.

Jack
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Old 07-31-2016, 09:44 AM   #83
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I don't feel comfortable going 70 even when driving the truck with no trailer. With the trailer I am even slower, 60 or maybe 65 downhill. I must be old! Remember the old days when 55 was the speed limit, and 65 was speeding? I still feel that way, even with everyone passing me. And I mean everyone. School buses pass me. Oh well.

Those old days were during the Arab oil embargo. Another big brother folly. Go slower burn less fuel but you burn it longer.
70 MPH is not exactly neck braking speed. Common sense and road experience will dictate safety at all times. I will drive at 70 providing the weather, road and traffic conditions will allow. Should any of those turn adverse the first thing that gets adjusted is the speed. As to not following too close, especially pulling a trailer, to me is basic common sense.
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Old 07-31-2016, 10:01 AM   #84
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"Go slower burn less fuel but you burn it longer."

It is true that you are burning longer when traveling slower, but at a different burn rate based upon speed. I don't remember the numbers but I believe that somewhere above 60ish mph the "standard" vehicle burn rate changes more as the air drag increases more rapidly. This increase burn rate over a shorter time results in more gas used for the same distance covered at the slower speed over a longer time. The air drag from a trailer and any roof top storage makes it even worst.
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