Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-10-2006, 12:38 AM   #169
Rivet Master
 
1992 34' Limited
Falls Church , Virginia
Join Date: Mar 2005
Posts: 945
OK, sorry to that this thread here....

Hello all -

Reading this thread with interest. Got new tires about 1 year ago - replaced what was there with exact same tire - different manufacturor.

Wondering if I am running with incorrect pressures.

'92 34' Classic Lmtd - triple axle. ST225 75R15 on original 15x6 rims.
GVWR of 8900 (on tag).
GAWR of 2800 per axle. Is that per wheel, ie each side??? 2800 x 3 =8400 That is under GVWR!?

Same tag says to inflate to 50psi cold. Tire says cap. is 2450 at 65psi.

ARG@#(*%#(!!!!!!!!!!!!!!

Help!!

I think I confused myself into a panic here....

Thanks for all thoughts

Axel
__________________

__________________
SilverToy is offline   Reply With Quote
Old 04-10-2006, 07:25 AM   #170
Site Team
 
, Minnesota
Join Date: Aug 2003
Posts: 6,940
Images: 59
Quote:
Originally Posted by SilverToy
. . . . .ARG@#(*%#(!!!!!!!!!!!!!!

Thanks for all thoughts

Axel
Axel,

You are in excellent shape. The axle rating is for two tires, so each tire needs to handle half the axle weight, or 1400 lbs.

That is only about 60% of the tire capacity, so 50 psi in the tire is a reasonable inflation pressure.

The axle rating plus the tongue weight is how the GVWR is calculated, so 8900# is a good number.

Now have a donut and pat yourself on the back!
__________________

__________________
markdoane is offline   Reply With Quote
Old 04-10-2006, 12:45 PM   #171
Moderator dude
 
Action's Avatar

 
1966 26' Overlander
Phoenix , Arizona
Join Date: Apr 2002
Posts: 6,067
Images: 13
Quote:
Originally Posted by SilverToy
'92 34' Classic Lmtd - triple axle. ST225 75R15 on original 15x6 rims.
GVWR of 8900 (on tag).
GAWR of 2800 per axle. Is that per wheel, ie each side??? 2800 x 3 =8400 That is under GVWR!?

Same tag says to inflate to 50psi cold. Tire says cap. is 2450 at 65psi.
Axel

Put another way.....

at 65PSI the tire cap is 2450 (I don't know what it is at 50 PSI) and you have 6 tires. So 6 X 2450 = 14,700 pounds of capacity for the tires. Take 90% (a 10% safety margin) and you really don't want to subject your tires to a total load of greater than 13,230.

Now your axles are rated for 2800 and you have 3. So 3 X 2800 = 8,400. Take 90% of that and you do not want to subject your axles to a total load of greater than 7560.

Do weigh your trailer in camping condition to find out if you are taxing your axles, since your total tire capacity far exceeds the axle ratings.

>>>>>>>>>>>>>>>>Action
__________________
1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!
Action is offline   Reply With Quote
Old 04-10-2006, 07:37 PM   #172
Cartoon Character
 
Porky Pig's Avatar
 
2004 34' Classic
On The Road , U.S.A.
Join Date: May 2002
Posts: 885
Images: 10
Quote:
Originally Posted by Action
Put another way..... at 65PSI the tire cap is 2450 (I don't know what it is at 50 PSI) ...
2150 .
__________________
Porky

TrailerGypsies.com
WBCCI #3405 Escapees #80360

I live the life I love and I love the life I live.
-- Willie Dixon
Porky Pig is offline   Reply With Quote
Old 04-13-2006, 11:08 AM   #173
Rivet Master
 
Cracker's Avatar
 
Currently Looking...
Pittsfield , Maine
Join Date: Oct 2003
Posts: 1,099
Correct Pressure??

This discussion finally came around to my question! During my factory vist, Airstream replaced my original Goodyear Marathon tires, load range "C," with new Goodyear Marathon, load range "D" tires. As Porky pointed out, the capacity of the "D" tires is 2,540 lbs at 65 psi, as opposed to 2,150 lbs at 50 psi for load range "C" or "D." Airstream originally recommended that the tires be inflated to 50 psi for my 2000 30' Excella. Accordingly, in order to achieve the softest ride, I would assume that the lower 50 psi pressure is still correct? I don't believe that Airstream is willing to arbitrarily increase my CCC by 1,560 lbs!
__________________
Cracker

2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074
Cracker is offline   Reply With Quote
Old 04-20-2006, 09:19 PM   #174
Rivet Master
 
1984 31' Excella
Norfolk , Virginia
Join Date: Jan 2005
Posts: 667
Images: 11
Tires....Tires...Tires

Here is something I read recently about adjusting tire pressure to load. Just wanted to get some feed back on this concept. This is easier with two people.
Take a piece of chalk and draw a line across the tread from sidewall to sidewall.
Move the unit forward enough for the tire to make two or three revolutions and stop with the remnants of the line so you can see it.
Check the line on the tire. If the line is gone in the center of the tire and fresh at the sholders then you have too much air in the tire. Conversely if the line is gone at the sholders and remains in the center, the tire is underinflated. The idea is to have the line disappear evenly across the tire from sholder to sholder.
I tried this with my tv. I still have the portable scales. I weighed each wheel and wrote the weight down. then did the chalk thing. When the chalk wore off evenly, I rechecked the tires and sure enough the tire with the least weight on it had the least pressure in it and the least amount of pressure seemed reasonable to me.
Any one ever heard of this. Any reason why not to use this method? Sure seems simple.
Again...Beginner, but learning
__________________
Beginner is offline   Reply With Quote
Old 05-13-2006, 12:09 AM   #175
3 Rivet Member
 
GoldFever's Avatar
 
2007 23' International CCD
Hemet , California
Join Date: May 2002
Posts: 106
Images: 2
Tire aging?

Should tires be replaced periodically even if not used much and showing little wear? I had two blowouts on my 25 foot Excella trailer roughly 4 years ago to tires that were on the trailer when I bought it. I believe they were about 3 to 4 years old when they blew. A friend (also with a 25 foot trailer) swears by replacing tires every 4 years no matter what condition. Safety and peace of mind on trips makes for a happy traveler.
PS - I am approaching the 4 year "anniversary" of new tires.
__________________
Gary & Susan Norgan
2007 International 23ft Ocean Breeze
Hemet, CA
"The key to flexibility is indecision"
GoldFever is offline   Reply With Quote
Old 05-13-2006, 01:12 PM   #176
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Tire questions.

Tires are replaced because of mileage, and because of time, no matter how few miles they may have traveled.

Replacing tires because of wear, is not a question.

Replacing tires, that have aged, but that have but a few miles on them, seems to be an uncertainty.

Rubber, has a memory, and must be flexed frequently, or the memory simply dies.

Flexing the tire itself, leads to a greater useful life, because of that flexing.

All of us have rubber bands at home, that are years old, because we use them often.

Most of use have also seem rubber bands, that were seldom used, that just simply turned gummy or brittle, and yet were from the same package as those that are still good.

Tires, basically react to use or non use as the case may be, in approximately the same way.

The Airstream trailer is some what the same way.

Historically, those owners that use their trailer very often, will typically pay "less" for routine repairs, than those owners who use the trailer just a few days a years.

Our repair records, more than prove that point, over and over again, year after year.

And besides that, Grandma, who is always right, still contends that, " if you don't use it, you will lose it".

I know she is talking about the Airstream trailers, because Grandpa, is still around.

Andt
__________________
Inland RV Center, In is offline   Reply With Quote
Old 05-13-2006, 07:56 PM   #177
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
The tire companies know their products better than anybody else. Their rubber engineers/chemists have spent years developing the very complex rubber compounds which go into making tires. There may be up to 30 compounds in a single tire. Some of these compounds contain special additives which leach to the surface to protect the rubber from Ozone and UV attack. Flexing them causes the additives to come to the surface faster, so there is some truth in tire may age more just sitting around. The bigger variable however is the environment they are in. Tires in CA,AZ,NM,TX, FL, and the rest of the south are exposed to more sun and Ozone than those parked in a barn in Wisconsin. You really can not apply the same aging rules to all enviroments. The Trailer rated tire have more anti-aging additive because the companies know they will not get as much wear per year as a car or truck. We should get someone out of the tire industry to make a contribution to this thread. What a dealer learns from his experience in California does not necessarily apply to possible tire usage in New England.
__________________
dwightdi is offline   Reply With Quote
Old 05-13-2006, 08:26 PM   #178
Rivet Master
 
1960 24' Tradewind
santa barbara , California
Join Date: Apr 2006
Posts: 1,352
i would say the tire rule is a good one,My 60 tradewind I purchased in nebraska had tires in excellent shape ,at least visualy,no cracks ,as new tread .YES a blow out on I 70 .The trailer was not loaded with anything heavy ,no water or cargo ,no sheets on the bed even. I checked inflation before traveling.The tires were not new however,just looked fine.They were some years old,still looked great.They failed .I go with the 4 year rule.I agree about harsher sun environments ,they are harder on an exposed tire.Sitting in a barn unused ,the tires still deteriorate ,cannot stop that from happening .
sitting unused they too deteriorate. dwightdi posted very good and informative information.I agree with most of it except the last sentence
which I dont get .If gnorgan is from hemet then he needs to change those tires,hemet is hot !! in the summer easily 100 degrees.

Scott
__________________
scottanlily is offline   Reply With Quote
Old 07-06-2006, 02:31 PM   #179
2 Rivet Member
 
acrane's Avatar
 
1980 31' Excella II
Stonewall , Mississippi
Join Date: Jun 2006
Posts: 32
Carlisle 10 Ply E Radials

My husband and I have a 31", 7100 lb Excella. Have been recommended to purchase a ST225/75R15 E Carlisle.

I have heard the Carlisle are not good.

Any recommendations?

Alice Crane
__________________
acrane is offline   Reply With Quote
Old 07-06-2006, 02:42 PM   #180
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Quote:
Originally Posted by acrane
My husband and I have a 31", 7100 lb Excella. Have been recommended to purchase a ST225/75R15 E Carlisle.

I have heard the Carlisle are not good.

Any recommendations?

Alice Crane
Since you own an Airstream, you must have some faith in the company.

That being the case, would it not be a wise idea, to also trust them with their choice of tires for the past many many years?

They use Goodyear Marathons, for a number of good reasons.

If you chose to use another brand, then you are doing the testing.

Andy
__________________
Inland RV Center, In is offline   Reply With Quote
Old 07-06-2006, 02:59 PM   #181
Rivet Master
 
bhayden's Avatar
 
1978 24' Argosy 24
Woodinville , Washington
Join Date: May 2006
Posts: 661
Images: 10
Quote:
Originally Posted by acrane
My husband and I have a 31", 7100 lb Excella. Have been recommended to purchase a ST225/75R15 E Carlisle. I have heard the Carlisle are not good.
Over the years Carlisle has used a number of suppliers. Recently they bought/merged with Titan; another tire manufacturer.

http://www.fool.com/boringport/1999/...port990811.htm

If I read this right Titan and Carlisle trailer tires will be made togther in the factories in China and/or Thailand. Looking at the list of factories around the world I'm not convinced Carlisle actually owns the factories but rather contracts capacity from other industry giants. I'm not at all clear on who does the engineering and design for the trailer tires, if tires from different plants are the same or how often the product changes due to market forces. Again, anyone that's bought tires recently I'd love to know the plant code for the tires.

I've seen claims that Carlisle is the number one supplier for new trailers sold in the USA. I don't know if it's true but, like Goodyear there are certainly a high number of them out there so it would be expected that you'd see a proportional number of failures reported.


A load range D tire should be more than adaquate for your trailer. There's some difference of opinion on using higher load range tires. Do they provide more of a safety margin or will they last longer? One thing for sure is that your rims are rated for a certain pressure and to exceed that pressure (quite likely with load range E tires at max) is a bad idea.

http://www.discounttire.com/dtcs/inf...ionAnxiety.dos

-Bernie
__________________
bhayden is offline   Reply With Quote
Old 07-06-2006, 03:15 PM   #182
Rivet Master
 
Bob Thompson's Avatar
 
Corpus Christi , Texas
Join Date: Sep 2003
Posts: 936
Images: 67
For the Record it is not necessarily wrong for a company to spec a product and have it manufactured by a contractor. Toyota has done it successfully for years. Corolla's and Tacoma's are made at a NUMMI plant in California. The '07 Camry's will be made at a Subaru Plant. I believe there are a number of B F Goodrich tires made by contractor's.

If you want to find out if Carlisle makes a good tire, Google "Carlisle Failure" or "Carlisle Blow-out" and see what others are saying. You might also try it with "Marathon Failure" or "Marathon Blow-out"
__________________

__________________
So Long!
Bob Thompson 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
1968 GT tires that will fit... RECOMMENDED ALUMINUMINUM Tires 5 10-31-2011 12:30 PM
Wide White Wall Tires wasagachris Tires 14 08-04-2011 10:32 PM
Tires and Alignment Airstream12557 Land Yacht/Legacy Motorhomes 0 06-08-2011 06:04 AM
Towmaster Tires mshamilton Tires 0 05-08-2011 10:38 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:28 AM.


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.