Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-28-2014, 09:53 AM   #29
Rivet Master
 
daveswenson's Avatar
 
2012 28' International
Issaquah , Washington
Join Date: Sep 2012
Posts: 767
Quote:
Originally Posted by r carl View Post
But it is real, a ST tire cant hold up to what a LT tire can do.
Nor is it designed to. And an ST tire can handle side loads that an LT tire cannot.


That being said, it's pretty obvious that there have been some catastrophic failures with ST tires. I have had good results with my ST tires. Maybe I've been lucky, or maybe it's because I use a TPMS system and know that I have never run them under inflated. And get new ones every 4 years.
__________________

__________________
Dave

2014 Ram 2500 CTD
Pro Pride
Centramatics
daveswenson is offline   Reply With Quote
Old 08-28-2014, 10:05 AM   #30
Rivet Master
 
r carl's Avatar
 
Vintage Kin Owner
Lin , Ne
Join Date: Dec 2009
Posts: 2,057
I don't think ST tires can't make you happy, I just think they could make you very unhappy.. I would hate to see anyone with a beat up wheel well.
__________________

__________________
The higher your expectations the fewer your options.
r carl is offline   Reply With Quote
Old 08-28-2014, 10:29 AM   #31
Full Time Adventurer
 
BoldAdventure's Avatar
 
2007 27' International CCD FB
Nomadic , USA
Join Date: Jul 2013
Posts: 2,743
According to my calculations, the dynamic inverse ratio to the circumference of the tire should create a multidimensional paradigm shift transversing the influx ratio of the torsion field when pressure is applied in the opposite wave front of the tires contact patch causing the ST tire to then decrease it's load capacity thusly being far inferior to wave front of the secondary particle emissions from the LT tire. When the wave front collapses the ST tire will then combust in a fit of rage.

Makes sense to me.
__________________
Family of 4 living, working & exploring the USA in our Airstream.
OUR BLOG | FACEBOOK | INSTAGRAM
BoldAdventure is offline   Reply With Quote
Old 08-28-2014, 10:54 AM   #32
Rivet Master
 
John&Vicki's Avatar
 
1990 25' Excella
Sisters , Oregon
Join Date: Jul 2013
Posts: 887
Images: 4
Quote:
Originally Posted by BoldAdventure View Post
According to my calculations, the dynamic inverse ratio to the circumference of the tire should create a multidimensional paradigm shift transversing the influx ratio of the torsion field when pressure is applied in the opposite wave front of the tires contact patch causing the ST tire to then decrease it's load capacity thusly being far inferior to wave front of the secondary particle emissions from the LT tire. When the wave front collapses the ST tire will then combust in a fit of rage.

Makes sense to me.
Bada Bada Bing!
__________________
John & Vicki
WBCCI #4291

Grown men don't need leaders. ~ Edward Abbey
John&Vicki is offline   Reply With Quote
Old 08-28-2014, 05:43 PM   #33
Rivet Master
 
Howard L.'s Avatar
 
2012 30' Flying Cloud
San Antonio , Texas
Join Date: Jul 2012
Posts: 591
Research, rather than our forum talk is probably the best advice if a change to LT Tires is in mind. Here is one of many articles on the subject:

http://rvingwithmarkpolk.com/2012/11...s-vs-lt-tires/

My problem with the ST tires is the 65 mph limit. Here is a statement from ModYourRV.COM.

"While it is widely believed that ST tires are limited to only 65 mph, both Goodyear and Maxxis (and Power King Towmax STR also). advise":

"Industry standards dictate that ST tires are restricted to a speed of 65 mph unless a different speed restriction is indicated on the tire sidewall. If speeds from 66 to 75 mph are used, the tire cold inflation pressure can be increased by 10 psi without any decrease in load." Note: Wheel pressure maximum rating must be considered if overinflating the tires to run at higher speeds."

Since I have Maxxis ST s on our 30, I called them to see if the above was correct. Along with a verbal answer, an email below was sent:

(Hello Howard,

According to the Tire and Rim Association the inflation pressures and load specifications in general for any ST Radial trailer tires, regardless of the manufacturer, are designed and rated at 65 MPH. However, if the speed is higher than 65 MPH, the pressure and load need to be adjusted according to the following guidelines:
From 66 to 75 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) but requires no load adjustment.
From 76 to 85 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) and load should be reduced by 10%.
We hope this information is helpful. Thanks for your email and interest in Maxxis Tires.
Best Regards,

Your Maxxis Support Team)

In summary, with a Tire and Rim Association Load/inflation chart of air pressure and weights for your Maxxis or Goodyear ST (or LT) tires in your hand, look up what air pressure is necessary to match the weight of your trailer with the weight carrying capacity of the tires. An example: say, it is 70psi for my Maxxis when carrying the weight of my 30. I can add 10 psi. That brings the tire pressure to 80 and has not exceeded the sidewall max. I now have an up to 75 MPH tire. To 85 MPH, heaven forbid, you can do it, but first remove 10% of that weight from the trailer. Another way to do the numbers would be to find the tire's certified max wt. at 10 psi under the tire sidewall listed max--again from your tire chart. Multiply that times the number of trailer tires. If trailer weight is under that, you are good to add 10 psi (right up to the sidewall max) and drive at 75. If you're trailer weight is also 10% below that figured number, you've met the second criteria and you can try to kill yourself at 85.

You can also go back and figure what the minimum air pressure would be to safely carry the weight of your trailer (that's the number you must add 10 psi to and is all that is required to speed up to 75). If you run your tires at max psi, and max is above what you must inflate to, the rest is a weight safety margin.

I'm not trying to sell anything here. I just run the Maxxis 8008s on our 30 FC at 75 to 80 psi and find myself doing 70 mph sometimes on these TX hi-ways. Wanted to know where I stood doing that. The chart tells me that as low as 40 psi in those tires, they are still not at their load limits--on my trailer--not that I would ever run them that low. If you look up the ST 8008's speed rating, it's "Q", that's 99 mph.

Look up "Load/Inflation information" for your tires:
Goodyear, http://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
Maxxis, http://www.maxxis.com/trailer/traile...nflation-chart

And so on for other brands. Sorry this so long, but thought good information.

Oh yes, checked with JC and the stock aluminum rims on my 2012 are good for 80 psi.


Sent from my iPad using Airstream Forums
__________________
Howard L. is offline   Reply With Quote
Old 08-28-2014, 07:27 PM   #34
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,649
Remember more pressure equals more energy if the tire decides to explode. ST tires are stiffer because of higher pressures.

Perry
__________________
perryg114 is offline   Reply With Quote
Old 08-28-2014, 09:41 PM   #35
Don't forget your cat nap
 
Ag&Au's Avatar
 
Port Orchard , Washington
Join Date: May 2009
Posts: 4,464
Images: 1
Quote:
Originally Posted by BoldAdventure View Post
According to my calculations, the dynamic inverse ratio to the circumference of the tire should create a multidimensional paradigm shift transversing the influx ratio of the torsion field when pressure is applied in the opposite wave front of the tires contact patch causing the ST tire to then decrease it's load capacity thusly being far inferior to wave front of the secondary particle emissions from the LT tire. When the wave front collapses the ST tire will then combust in a fit of rage.

Makes sense to me.
Finally, something I can agree with.

Ken
__________________
Ag&Au is offline   Reply With Quote
Old 08-28-2014, 09:53 PM   #36
Don't forget your cat nap
 
Ag&Au's Avatar
 
Port Orchard , Washington
Join Date: May 2009
Posts: 4,464
Images: 1
Quote:
Originally Posted by Howard L. View Post
Research, rather than our forum talk is probably the best advice if a change to LT Tires is in mind. Here is one of many articles on the subject:

............................................
see original post for text deleted for brevity.
...........................................
And so on for other brands. Sorry this so long, but thought good information.

Oh yes, checked with JC and the stock aluminum rims on my 2012 are good for 80 psi.


Sent from my iPad using Airstream Forums
When dealing with any engineered product, it is generally true that you can find ways to exceed the maximum rated loads to some degree with a low probability of failure. This is because sound engineering practice dictates a safety margin be designed in, However universally, when you exceed the stated maximum specifications, you will reduce the safety margin by some degree. My opinion is that it doesn't make sense to play lotto with safety margins, because the margins and what factors cause them to vary are generally unknown to the end user.

Ken
__________________
Ag&Au is offline   Reply With Quote
Old 08-28-2014, 10:24 PM   #37
Rivet Master
 
Howard L.'s Avatar
 
2012 30' Flying Cloud
San Antonio , Texas
Join Date: Jul 2012
Posts: 591
Quote:
Originally Posted by Ag&Au View Post
When dealing with any engineered product, it is generally true that you can find ways to exceed the maximum loads to some degree with a low probability of failure. This is because sound engineering practice dictates a safety margin be designed in, However universally, when you exceed the stated maximum specifications, you will reduce the safety margin by some degree. My opinion is that it doesn't make sense to play lotto with safety margins, because the margins and what factors cause them to vary are generally unknown to the end user.

Ken

And mounting LT tires, designed for powered vehicles, designed for good traction while maneuvering starting, stoping on a heavy weight towed vehicle is not playing lotto? I know I must be missing something in your analysis. Adding 10 psi to gain another 10 mph max speed is the guideline of the same Tire and Rim Association that set the basic 65 mph max speed for all ST tires in the first place. Hardly playing lotto. Again, the Maxxis ST tire quoted above is manufactured as a "Q" speed rated tire.


Sent from my iPad using Airstream Forums
__________________
Howard L. is offline   Reply With Quote
Old 08-29-2014, 12:31 AM   #38
Don't forget your cat nap
 
Ag&Au's Avatar
 
Port Orchard , Washington
Join Date: May 2009
Posts: 4,464
Images: 1
Quote:
Originally Posted by Howard L. View Post
And mounting LT tires, designed for powered vehicles, designed for good traction while maneuvering starting, stoping on a heavy weight towed vehicle is not playing lotto? I know I must be missing something in your analysis. Adding 10 psi to gain another 10 mph max speed is the guideline of the same Tire and Rim Association that set the basic 65 mph max speed for all ST tires in the first place. Hardly playing lotto. Again, the Maxxis ST tire quoted above is manufactured as a "Q" speed rated tire.


Sent from my iPad using Airstream Forums
Let me quote my own post:

Quote:
Originally Posted by Ag&Au View Post
When dealing with any engineered product, it is generally true that you can find ways to exceed the maximum rated loads to some degree with a low probability of failure. This is because sound engineering practice dictates a safety margin be designed in, However universally, when you exceed the stated maximum specifications, you will reduce the safety margin by some degree. My opinion is that it doesn't make sense to play lotto with safety margins, because the margins and what factors cause them to vary are generally unknown to the end user.

Ken
Definition of opinion

o·pin·ion
əˈpinyən
noun
noun: opinion; plural noun: opinions
a view or judgment formed about something, not necessarily based on fact or knowledge.

Based on that, I don't feel I need to defend what I said.

Now, had I said "It is a fact that...... etc." rather than "it is my opinion" Then perhaps I should feel a need to argue about it, but I didn't, so I don't.

Ken
__________________
Ag&Au is offline   Reply With Quote
Old 08-29-2014, 07:12 AM   #39
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,649
Everything is an opinion on here. Some are good some are bad and some are more informed than others.

Perry
__________________
perryg114 is offline   Reply With Quote
Old 08-29-2014, 09:47 AM   #40
Full Time Adventurer
 
BoldAdventure's Avatar
 
2007 27' International CCD FB
Nomadic , USA
Join Date: Jul 2013
Posts: 2,743
Whats that saying about opinions and your bottom side?
__________________
Family of 4 living, working & exploring the USA in our Airstream.
OUR BLOG | FACEBOOK | INSTAGRAM
BoldAdventure is offline   Reply With Quote
Old 08-29-2014, 10:19 AM   #41
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,649
ST tires have a much easier like than car tires and they are build much less robust and much lighter weight. You can look at the weight of a tire and tell that.

Perry
__________________
perryg114 is offline   Reply With Quote
Old 08-29-2014, 10:55 AM   #42
Don't forget your cat nap
 
Ag&Au's Avatar
 
Port Orchard , Washington
Join Date: May 2009
Posts: 4,464
Images: 1
Quote:
Originally Posted by gmeikle View Post
I'm with you rp709. I found that in 30 years of sales that unhappy customers are much more vociferous than happy customers and it unfortunately shows up in the statistics and ratings of many products.


George
This is, in my opinion, as it should be. There once was a day in our society when consumers expected a product to be well built and designed for best performance. I am old enough to remember that. Building a decent product with the customers' needs as number one and being satisfied with a reasonable profit was the norm and not in need of any special praise. With nearly everything today being manufactured where the labor and materials are the least expensive, and with maximizing the stockholders' profits and ridiculously overpaid executives' salaries being the only important objective, buyers are not apt to find much worthy of praise. In my recent experience, "acceptable, but barely so and overpriced" is the rating I would give to 90% of what I buy.

In my mind, lack of criticism is a form of praise in today's marketplace. It is extremely seldom that I find I product i consider worthy of praise.

However, I have for a long time held the belief that one should not expect praise for simply meeting the minimum requirements for anything.

Ken
__________________

__________________
Ag&Au is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tires...Tires...Tires Bob Thompson Tires 277 07-30-2015 02:30 PM
tires radials or bias ply tires larry b Tires 22 06-27-2010 06:36 PM
Tires ready to blow out! Should Marathon tires be outlawed? marchesi Tires 21 08-22-2009 11:11 AM
Help tires, tires, tires. jimmini Tires 9 10-18-2008 08:54 PM
Tires, anybody ever heard of Specialty Tires of America? lebolewis Tires 3 06-08-2006 05:11 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:28 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.