Know your equipment - true story

[Dale M.]

About tire pressures.....

For Michelin

Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall

Granted the above is about car manufacturers recommendation of tire pressures for a particular tire found on specific car model...

BUT this tells me you inflate tires by what ever application you are using tire for NOT THE MAXIMUM STATED ON TIRE SIDE WALL....

Dale

Dale, even if the special trailer tire manufacture states that the trailer tire was designed only to be used at the maximum stated on the tire, and NOT at reduced tire pressures? The tire was designed to be run only at the max pressure stated...anything less than and all the design work put into making that tire safe is out the window.

I, in good conscience, cannot say that I know more about the specific tires on my trailer than the engineer who designed them. If he/she says that were designed to be run only at 50psi then I have to go by that. If I had the knowledge/degree that he/she has, the experience, and the computer software they used, then I might venture into thinking that I know more, or at least as much, about their tires than they do. At that point I might decide to change the air pressure...but alas, I don't.

And nothing personal, but I don't think there is anybody in here that can convince me that they know more than the specific engineer who designed the specific tires on my teardrop.

I respectful disagree........ I have a 16 ft Carson tandem axle car hauler that is rated for 7000lbs gross weight, empty it weighs in at 1460 lbs ... I just put 4 brand new "Trailer Special" (trailer rated only) tires on it... On side wall of tire it says, "See owners manual and vehicle placard for proper inflation pressures"..... IT also states "MAX LOAD 825 kg (1850 lbs) @ 350kpa (50 psi) COLD".... Lead me to believe 50 psi is MAXIMUM pressure I can (should ) run if trailer with load ( tire limit) is at 7240lbs... Also tire are rated as "Load Range C" which in link below says MAXIMUM inflation pressure of 50psi... All which leads me to think one adjust tire pressures according to load weights/wear patterns....Incidentally tire shop owner recommended that I run them at 40 psi for "medium to heavy loads"... Hes also stated for my application my 4000 lb jeep qualifies in that range if it were on trailer...

http://www.tirerack.com/tires/tiretech/ ... 6698650813


EDIT TO ADD:
I think you have a real misunderstanding of MAXIMUM and what it means in context.... It means no more than, does not mean "less that".... Its like in legal system and with our laws, there is a great difference in meaning of "shall" or "will" and the meaning of "may" or "possible"....

In this case of tires and this context and all the data anyone has presented, even by you, it all really means you can run any air pressure you want, with the understanding of load and wear, but at any point you should not exceed the maximum value stated ... I have never seen a tire that says inflate to exactly 50 psi or some such number (I will concede they probably do exist) but not in the world I move in....

Dale

[Jim Edgerly]

Jim;

I have to admit, my responses to this topic were based 100% on both recommendations for and personal use of passenger car and light truck tires.

I can't imagine how the tire industry can think that it's desirable for a passenger car tire sidewall to flex and a trailer tire sidewall not to flex, but you are correct, they absolutely do recommend running max pressure in trailer tires.


Folks, please, PLEASE recognize this is not the case with passenger car and light truck tires! No manufacturer, not one, recommends running max pressure in a car or truck tire unless you are at max load. Every car has a placard, usually on the drivers side door post, with recommended tire pressures. The number on the side of the tire is NOT the recommended pressure!

Jim, I'm sorry for derailing your thread. You were right, I was wrong. I saw what I wanted to see, not what you wrote.

For my 2 cents, I'm not trying to convince anyone to do anything. I'm just passing along information that I've found that comes from what I believe to be reliable sources, like this one. http://www.trailmastertrailers.com/pdf/ ... safety.pdf

I will point out that tear drops are an exception to most other trailers. The majority of trailers fall into two categories,
Travel trailers, which are made by manufacturers that pick the cheapest tire they can that will support the weight of the trailer, and when loaded by its owners, is probably over the limit of the tire. In this case for a manufacturer to recommend Max tire pressure makes total sense
The other group is cargo trailers of one type or another. They may run empty one trip and full the next, so in this case it makes sense for the tire mfg to recommend max pressure, because you should prepare for the worst case wear.

The TD weight is usually much lighter than the tire max capacity, and the weight of the TD doesn't climb significantly when loaded ( at least with the ones I've seen). So I still believe that there is plenty of room to reduce the air pressure on these tires to conform with the lower load rating. When done properly this should reduce the heat and wear on the tire. No I'm not a tire engineer, and I'm not trying to talk anyone into doing what I do. But that is what I do.
Tom

Tom, your reference to "reliable sources, like this one" really does not help your case for what you are stating. If I may quote a few places from your source:


1) "Always keep the tire manufacturer's maximum recommended air pressure in all your tires, including the spare. This is an importand requirement for tire safety and mileage. Tire sidewall stamping information will tell you the recommended cold air pressure."

2) Tire pressure table: "The above table DOES NOT endorse the reduction of air pressure. It is to be used as an example of the relationship between air pressure vs. load or lack there of. Carlisle Tire & Wheel only recommends and only warrants tires maintained @ max air pressure while in service."

3) "MAXIMUM PSI? Maximum load range is attained only when the tire is at its maximum air pressure. There is no advantage to taking air out of the tire. With maximum pressure, the tire will perform and wear better, and you will get better gas mileage. Reduce the PSI, and you compromise the functionality of the tire."

That is enough for me to run at the recommended max pressure stated on the tirewall.

[Jim Edgerly]

About tire pressures.....

For Michelin

Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall

Granted the above is about car manufacturers recommendation of tire pressures for a particular tire found on specific car model...

BUT this tells me you inflate tires by what ever application you are using tire for NOT THE MAXIMUM STATED ON TIRE SIDE WALL....

Dale

Dale, even if the special trailer tire manufacture states that the trailer tire was designed only to be used at the maximum stated on the tire, and NOT at reduced tire pressures? The tire was designed to be run only at the max pressure stated...anything less than and all the design work put into making that tire safe is out the window.

I, in good conscience, cannot say that I know more about the specific tires on my trailer than the engineer who designed them. If he/she says that were designed to be run only at 50psi then I have to go by that. If I had the knowledge/degree that he/she has, the experience, and the computer software they used, then I might venture into thinking that I know more, or at least as much, about their tires than they do. At that point I might decide to change the air pressure...but alas, I don't.

And nothing personal, but I don't think there is anybody in here that can convince me that they know more than the specific engineer who designed the specific tires on my teardrop.

I respectful disagree........ I have a 16 ft Carson tandem axle car hauler that is rated for 7000lbs gross weight, empty it weighs in at 1460 lbs ... I just put 4 brand new "Trailer Special" (trailer rated only) tires on it... On side wall of tire it says, "See owners manual and vehicle placard for proper inflation pressures"..... IT also states "MAX LOAD 825 kg (1850 lbs) @ 350kpa (50 psi) COLD".... Lead me to believe 50 psi is MAXIMUM pressure I can (should ) run if trailer with load ( tire limit) is at 7240lbs... Also tire are rated as "Load Range C" which in link below says MAXIMUM inflation pressure of 50psi... All which leads me to think one adjust tire pressures according to load weights/wear patterns....Incidentally tire shop owner recommended that I run them at 40 psi for "medium to heavy loads"... Hes also stated for my application my 4000 lb jeep qualifies in that range if it were on trailer...

http://www.tirerack.com/tires/tiretech/ ... 6698650813

Dale

The difference between your trailer empty and full is over 5500lbs, mine is more like 2000 or less difference. And I DO NOT recognize your tire dealer as more of an expert on my trailer tires than the engineer who designed them. I'll even bet he can't even tell me the manufacturer of my tires.

At least we will agree to disagree and we can end it at that.

[Dale M.]

About tire pressures.....

For Michelin

Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall

Granted the above is about car manufacturers recommendation of tire pressures for a particular tire found on specific car model...

BUT this tells me you inflate tires by what ever application you are using tire for NOT THE MAXIMUM STATED ON TIRE SIDE WALL....

Dale

Dale, even if the special trailer tire manufacture states that the trailer tire was designed only to be used at the maximum stated on the tire, and NOT at reduced tire pressures? The tire was designed to be run only at the max pressure stated...anything less than and all the design work put into making that tire safe is out the window.

I, in good conscience, cannot say that I know more about the specific tires on my trailer than the engineer who designed them. If he/she says that were designed to be run only at 50psi then I have to go by that. If I had the knowledge/degree that he/she has, the experience, and the computer software they used, then I might venture into thinking that I know more, or at least as much, about their tires than they do. At that point I might decide to change the air pressure...but alas, I don't.

And nothing personal, but I don't think there is anybody in here that can convince me that they know more than the specific engineer who designed the specific tires on my teardrop.

I respectful disagree........ I have a 16 ft Carson tandem axle car hauler that is rated for 7000lbs gross weight, empty it weighs in at 1460 lbs ... I just put 4 brand new "Trailer Special" (trailer rated only) tires on it... On side wall of tire it says, "See owners manual and vehicle placard for proper inflation pressures"..... IT also states "MAX LOAD 825 kg (1850 lbs) @ 350kpa (50 psi) COLD".... Lead me to believe 50 psi is MAXIMUM pressure I can (should ) run if trailer with load ( tire limit) is at 7240lbs... Also tire are rated as "Load Range C" which in link below says MAXIMUM inflation pressure of 50psi... All which leads me to think one adjust tire pressures according to load weights/wear patterns....Incidentally tire shop owner recommended that I run them at 40 psi for "medium to heavy loads"... Hes also stated for my application my 4000 lb jeep qualifies in that range if it were on trailer...

http://www.tirerack.com/tires/tiretech/ ... 6698650813

Dale

The difference between your trailer empty and full is over 5500lbs, mine is more like 2000 or less difference. And I DO NOT recognize your tire dealer as more of an expert on my trailer tires than the engineer who designed them. I'll even bet he can't even tell me the manufacturer of my tires.

At least we will agree to disagree and we can end it at that.

YEP.... Think the tens of thousands or words written and the experience of my tire dealer trumps you interpretations of the written word or your opinion on this......

Dale

[Jim Edgerly]

About tire pressures.....

For Michelin

Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall

Granted the above is about car manufacturers recommendation of tire pressures for a particular tire found on specific car model...

BUT this tells me you inflate tires by what ever application you are using tire for NOT THE MAXIMUM STATED ON TIRE SIDE WALL....

Dale

Dale, even if the special trailer tire manufacture states that the trailer tire was designed only to be used at the maximum stated on the tire, and NOT at reduced tire pressures? The tire was designed to be run only at the max pressure stated...anything less than and all the design work put into making that tire safe is out the window.

I, in good conscience, cannot say that I know more about the specific tires on my trailer than the engineer who designed them. If he/she says that were designed to be run only at 50psi then I have to go by that. If I had the knowledge/degree that he/she has, the experience, and the computer software they used, then I might venture into thinking that I know more, or at least as much, about their tires than they do. At that point I might decide to change the air pressure...but alas, I don't.

And nothing personal, but I don't think there is anybody in here that can convince me that they know more than the specific engineer who designed the specific tires on my teardrop.

I respectful disagree........ I have a 16 ft Carson tandem axle car hauler that is rated for 7000lbs gross weight, empty it weighs in at 1460 lbs ... I just put 4 brand new "Trailer Special" (trailer rated only) tires on it... On side wall of tire it says, "See owners manual and vehicle placard for proper inflation pressures"..... IT also states "MAX LOAD 825 kg (1850 lbs) @ 350kpa (50 psi) COLD".... Lead me to believe 50 psi is MAXIMUM pressure I can (should ) run if trailer with load ( tire limit) is at 7240lbs... Also tire are rated as "Load Range C" which in link below says MAXIMUM inflation pressure of 50psi... All which leads me to think one adjust tire pressures according to load weights/wear patterns....Incidentally tire shop owner recommended that I run them at 40 psi for "medium to heavy loads"... Hes also stated for my application my 4000 lb jeep qualifies in that range if it were on trailer...

http://www.tirerack.com/tires/tiretech/ ... 6698650813

Dale

The difference between your trailer empty and full is over 5500lbs, mine is more like 2000 or less difference. And I DO NOT recognize your tire dealer as more of an expert on my trailer tires than the engineer who designed them. I'll even bet he can't even tell me the manufacturer of my tires.

At least we will agree to disagree and we can end it at that.

YEP.... Think the tens of thousands or words written and the experience of my tire dealer trumps you interpretations of the written word or your opinion on this......

Dale

So you can't even agree to disagree and leave it at that...you're a classy dude Dale! Luckily "the tens of thousands of words written" by your unknown guru "tire shop owner" is meaningless to me compared to what the industry experts and design engineers say or I might lose sleep over it.

"Always keep the tire manufacturer's maximum recommended air pressure in all your tires, including the spare."...I can see why you would think I could misinterpret this statement since it is written so vague. But ya know, I think I have a fairly good understanding of what this means.

I don't know why it is so important to you to try so hard to sway my opinion to bend to yours, but I thank you for thinking I am that important that it is worth your trying so hard, and your insults to me at your failure to be successful in doing so.

Hopefully this is the last of this because it's been a long day and I am really tired of this dribble. You really need to learn to recognize when to let go. I'll show you how...I am no longer going to read your posts on this subject regardless of how many times you insult me, how many tire shop owners you reference, or how many tens of thousands of words they have written. Enough is enough.

[warnmar10]

Maybe it's the wrong tire for your trailer?

[Jim Edgerly]

Maybe it's the wrong tire for your trailer?

It's basically the smallest 14" tire I can put on my trailer. I did not like the 12" tires that came with the trailer, especially for highway speeds. So getting back to the subject, do you carry a 12V air pump on the road, and if you do have you had good luck with it?

[PaulC]

Okay you two, let it go. One says black and the others says white. Remember our basic rule and this thread stays open. Ignore our rule and it will be locked for all to see.
Cheers
Paul

[Jim Edgerly]

I already let it go Paul...I told him enough was enough. If I want to run 50psi that is my wish and nobody elses concern. This thread is back to 12V air pumps and tire guages. I will delete the thread if anything like that starts again. I'm surprised it took you (or anybody else) as long as it did to say enough was enough. This is a friendly thread and must remain so.

So, in that vein, do you carry a 12V air pump in your TD, and if yes what kind?

[PaulC]

I already let it go Paul...I told him enough was enough. If I want to run 50psi that is my wish and nobody elses concern. This thread is back to 12V air pumps and tire guages. I will delete the thread if anything like that starts again. I'm surprised it took you (or anybody else) as long as it did to say enough was enough. This is a friendly thread and must remain so.

So, in that vein, do you carry a 12V air pump in your TD, and if yes what kind?

As an Admin we tend to let threads work themselves out, if possible, otherwise we drop a gentle reminder about our basic rule. This may happen after one or two posts or, as in your case, a few more. We try not to jump in at the slightest sign of disagreement.
As for your being surprised at how long it took for something to be said, may I suggest to you that it takes two to tango and I don't feel like dancing tonight
I don't carry a 12v air compressor in my TD but, neither do I run specialist trailer tyres. Being quite honest, I've never heard of them before for use in our situation.
Cheers
Paul

[Jim Edgerly]

Paul, someone sent me a personal message that if I don't value his opinion and wish to read no more of his messages I can just add him to my "Foe List." I remember seeing something about that a couple years ago and thinking I would not need something like a Foe List. Well, I'm going to search how to do it and start my Foe list. Sad, but just like checking air pressure, it is something that just needs to be done.

thanks for the help and have a nice day, Jim

[jss06]

Being a Jeeper as well, I carry a 12v compressor that I connect direct to the battery. it's one that I picked up at 4 Wheel Parts for about $50 and is designed for extended use.

[Jim Edgerly]

Being a Jeeper as well, I carry a 12v compressor that I connect direct to the battery. it's one that I picked up at 4 Wheel Parts for about $50 and is designed for extended use.

John, Does it pump up to 50psi? Can you give me the name/model #, or a link to it? thanks, Jim

[Dale M.]

About tire pressures.....

For Michelin

Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall

Granted the above is about car manufacturers recommendation of tire pressures for a particular tire found on specific car model...

BUT this tells me you inflate tires by what ever application you are using tire for NOT THE MAXIMUM STATED ON TIRE SIDE WALL....

Dale

Dale, even if the special trailer tire manufacture states that the trailer tire was designed only to be used at the maximum stated on the tire, and NOT at reduced tire pressures? The tire was designed to be run only at the max pressure stated...anything less than and all the design work put into making that tire safe is out the window.

I, in good conscience, cannot say that I know more about the specific tires on my trailer than the engineer who designed them. If he/she says that were designed to be run only at 50psi then I have to go by that. If I had the knowledge/degree that he/she has, the experience, and the computer software they used, then I might venture into thinking that I know more, or at least as much, about their tires than they do. At that point I might decide to change the air pressure...but alas, I don't.

And nothing personal, but I don't think there is anybody in here that can convince me that they know more than the specific engineer who designed the specific tires on my teardrop.

I respectful disagree........ I have a 16 ft Carson tandem axle car hauler that is rated for 7000lbs gross weight, empty it weighs in at 1460 lbs ... I just put 4 brand new "Trailer Special" (trailer rated only) tires on it... On side wall of tire it says, "See owners manual and vehicle placard for proper inflation pressures"..... IT also states "MAX LOAD 825 kg (1850 lbs) @ 350kpa (50 psi) COLD".... Lead me to believe 50 psi is MAXIMUM pressure I can (should ) run if trailer with load ( tire limit) is at 7240lbs... Also tire are rated as "Load Range C" which in link below says MAXIMUM inflation pressure of 50psi... All which leads me to think one adjust tire pressures according to load weights/wear patterns....Incidentally tire shop owner recommended that I run them at 40 psi for "medium to heavy loads"... Hes also stated for my application my 4000 lb jeep qualifies in that range if it were on trailer...

http://www.tirerack.com/tires/tiretech/ ... 6698650813

Dale

The difference between your trailer empty and full is over 5500lbs, mine is more like 2000 or less difference. And I DO NOT recognize your tire dealer as more of an expert on my trailer tires than the engineer who designed them. I'll even bet he can't even tell me the manufacturer of my tires.

At least we will agree to disagree and we can end it at that.

YEP.... Think the tens of thousands or words written and the experience of my tire dealer trumps you interpretations of the written word or your opinion on this......

Dale

So you can't even agree to disagree and leave it at that...you're a classy dude Dale! Luckily "the tens of thousands of words written" by your unknown guru "tire shop owner" is meaningless to me compared to what the industry experts and design engineers say or I might lose sleep over it.

"Always keep the tire manufacturer's maximum recommended air pressure in all your tires, including the spare."...I can see why you would think I could misinterpret this statement since it is written so vague. But ya know, I think I have a fairly good understanding of what this means.

I don't know why it is so important to you to try so hard to sway my opinion to bend to yours, but I thank you for thinking I am that important that it is worth your trying so hard, and your insults to me at your failure to be successful in doing so.

Hopefully this is the last of this because it's been a long day and I am really tired of this dribble. You really need to learn to recognize when to let go. I'll show you how...I am no longer going to read your posts on this subject regardless of how many times you insult me, how many tire shop owners you reference, or how many tens of thousands of words they have written. Enough is enough.

Be careful here.... The 10,000 words is NOT written by JUST my unknow local tire GURU.... Its a collective of information from many tire sites upon the internet.... Once you make a misstatement like this to prove your point, anything else you have to say is irreverent and probably false.... Yes we agree to disagree.......

Your only real problem is how to determine what maximum recommended pressure is..... It is NOT the number stamped on side tire that states MAX PRESSURE.... Maximum recommended pressure is a combination of load rating, tire size, and weigh of trailer distributed on each tire and can be verified by wear pattern on tire........

Dale

[Jim Edgerly]

Cool...adding somebody to your Foe List removes every post that person has ever made from your sight. It's like removing them from existence. If only there was something like this I could invoke for my "Ex-". It's been 35 years, but wouln't mind trying to remove her from my memory.

Any other neat features in here I should give a try?