Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-11-2007, 11:48 PM   #29
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 Bob Thompson
find the exact center point of the back of the ball opening at the trailer tongue, then measure very carefully from the exact center point of the back of the ball opening to the closest point of each wheel (usually the inside of the wheel rim.
It's easier to use the center of the jack post.
Quote:
Measure very carefully. If the measurements are within 1/4", the alignment of the axles is probably in the acceptable tolerance range. Mine were the exact same dimension! And..... putting a straight edge across both tires on the same sideconfirmed there was no tow in/out problems.
On a 31 foot trailer, each 1/8 inch difference, will make the trailer, from front to back, tow about 3 inches "dog leg."

A 1/4 inch difference should make the trailer tow about 6 inches "dog leg," and so forth.

A better place to measure is from the center of the jack post, to the lowest leading edge of the axle mounting plates. That dimension should be "exactly" the same.

If that dimension is off, even 1/8 of an inch, then a different alignment procedure must be used to align the axles, since you would not have "exactly" a tandem axle setup, but more so a staggered 4 wheel suspension.

This was some what common in the early 70 and 71 trailers.

This can also apply to a single axle trailer as well.

Andy
__________________

__________________
Inland RV Center, In is offline   Reply With Quote
Old 10-16-2008, 04:19 PM   #30
Sky
Classic 30
 
Sky's Avatar
 
Sum Wear , Ohio
Join Date: Mar 2005
Posts: 569
Images: 6
Hey Jeff, did you ever resolve this problem? It sounds like I have the same issue. My tires had less than 10K on them when I noticed the problem. The front curb side Marathon was bald on the outside half. The other three tires looked fine. I was in the great state of Utah at the time, so I put the spare Marathon on and continued with the trip. I put about 2500 miles on the spare by the time I got home, but notice no unusual wear on it.

I made an appointment to have an alignment done at Jackson Center. I just got back from that appointment today, and they tell me I don't need an alignment, everything checks out OK. I keep my tires at 65psi and monitor them with Pressure Pro and a standard pressure gauge, so inflation pressure should not be a factor. We decided to watch the new tire carefully, and bring it back in to JC if I see the same thing happening.

Soooo, when I got home I started searching the forums and found this thread. I was wondering how your case turned out.

In this economy, I can't afford a new tire every 10K miles.

Thanks
Dale
__________________

__________________
"Only dull people are brilliant at breakfast" - Oscar Wilde

2500HD DMax............30' Classic
__________________
Sky is offline   Reply With Quote
Old 10-16-2008, 05:10 PM   #31
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 Sky View Post
Hey Jeff, did you ever resolve this problem? It sounds like I have the same issue. My tires had less than 10K on them when I noticed the problem. The front curb side Marathon was bald on the outside half. The other three tires looked fine. I was in the great state of Utah at the time, so I put the spare Marathon on and continued with the trip. I put about 2500 miles on the spare by the time I got home, but notice no unusual wear on it.

I made an appointment to have an alignment done at Jackson Center. I just got back from that appointment today, and they tell me I don't need an alignment, everything checks out OK. I keep my tires at 65psi and monitor them with Pressure Pro and a standard pressure gauge, so inflation pressure should not be a factor. We decided to watch the new tire carefully, and bring it back in to JC if I see the same thing happening.

Soooo, when I got home I started searching the forums and found this thread. I was wondering how your case turned out.

In this economy, I can't afford a new tire every 10K miles.

Thanks
Dale
Dale.

Abnormal tire wear for most part, is caused by lack of ptoper running gear balance, that is tire, wheel, hub and drum, as an assembly.

You can check the alignment yourself, with a ruler and straight edge.

Each tire should have a tow in of 1/16 inch, plus or minus 1/16 inch.

The bottom of the tires should be more inboard than the top of the tires, again, by a small amount of 3/4 degree plus or minus 3/4 degree.

Andy
__________________
Inland RV Center, In is offline   Reply With Quote
Old 01-13-2009, 12:35 PM   #32
4 Rivet Member
 
Eagle & Bear's Avatar
 
1976 29' Ambassador
Madison , Officially SD but are traveling full time.
Join Date: Sep 2007
Posts: 251
Images: 1
Going through the threads because I am having problems with irregular tread wear. I found a comment in the AS owners manual. Their explanation for more wear on the curb side is that the "cant" or high center of the road throws more weight onto the curb side tires.

The tires on my '76 Ambassador are bias ply. Took the AS to the local tire shop and they said bias ply tires just wear irregularly and I cannot expect much more that 15K mi out of them. They are cheap but I don't like the poor level of quality in the product.

Anyone know how to check if the shocks are good?

Michael
__________________
Eagle & Bear is offline   Reply With Quote
Old 01-13-2009, 12:47 PM   #33
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 Eagle & Bear View Post
Going through the threads because I am having problems with irregular tread wear. I found a comment in the AS owners manual. Their explanation for more wear on the curb side is that the "cant" or high center of the road throws more weight onto the curb side tires.

The tires on my '76 Ambassador are bias ply. Took the AS to the local tire shop and they said bias ply tires just wear irregularly and I cannot expect much more that 15K mi out of them. They are cheap but I don't like the poor level of quality in the product.

Anyone know how to check if the shocks are good?

Michael
30 year old shocks should be replaced.

The running gear should be balanced as an assembly.

The axle could be out of alignment.

A bad axle could cause funny tire wear.

Check out your axles yourself, in 30 seconds.

Dura Torque Axle

Andy
__________________
Inland RV Center, In is offline   Reply With Quote
Old 01-13-2009, 01:21 PM   #34
4 Rivet Member
 
Eagle & Bear's Avatar
 
1976 29' Ambassador
Madison , Officially SD but are traveling full time.
Join Date: Sep 2007
Posts: 251
Images: 1
Hi Andy,

Thanks for the info. I did have new 8 ply bias ply tires put on 16 months (14,000 mi) ago. They seemed to wear OK but had problems with adjusting breaks. 8 months ago I had new backing plate assemblys installed and drums turned. Brakes work good but tires are all wearing in very weird patterns. Trailer towes good.

It looks like the axles have been changed sometime in the past (original owner died several weeks after I bought the trailer so no real history available). Clear evidence of alignment on rear axle. Tortion arms are slightly negative under load and over 20 deg neg without a load. There is almost 5" between the wheel well edge and the top of the wheel rim. The shocks dont have any rust on them (paint is in tact but not shiny). No signs of leaking from the shocks but the tire wear is irregular.

The tires do not show any signs of toe in or toe out but the tread shows a lot of cupping and heavy wear on the #2 and #4 band on a 5 band tread pattern (outer part of tread is cupped but not heavily worn and center band is not cupped or heavily worn - not consistent with over or under inflation). I thought I should check the shocks anyway but am not sure how.


Michael
__________________
Eagle & Bear is offline   Reply With Quote
Old 01-13-2009, 01:28 PM   #35
Moderator dude
 
Action's Avatar

 
1966 26' Overlander
Phoenix , Arizona
Join Date: Apr 2002
Posts: 6,067
Images: 13
Quote:
Originally Posted by Eagle & Bear View Post
The tires do not show any signs of toe in or toe out but the tread shows a lot of cupping and heavy wear on the #2 and #4 band on a 5 band tread pattern (outer part of tread is cupped but not heavily worn and center band is not cupped or heavily worn - not consistent with over or under inflation). I thought I should check the shocks anyway but am not sure how.
Michael

Look at post 26 & 27 above.

>>>>>>>>>>>>>>>>>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 01-08-2015, 08:09 AM   #36
4 Rivet Member
 
BeachHouse's Avatar
 
2005 25' International CCD
Lilburn , Georgia
Join Date: Dec 2011
Posts: 261
Blog Entries: 1
Any thing new? Our 2005 25' International has high tire wear on the curb site on both tires. We do have GYM's. It is even across the treads. The street side tires still have plenty of tread left. The tires have been installed for 27 months. We figure we have about 20,000 miles on all of the tires (same age). Discount Tire had no answer. They suggested replacing the two worn tires and put the new ones on the back axle and then put the less worn street side tires on the front axle.

We have a TPMS since we got the new tires so I know the pressure and temps are consistent. We had been running at 65#, but recently have let them go down to 60# (opinion seems to vary as to whether to keep them at the max or adjust based based on load).

I would appreciate any thoughts?
__________________
BeachHouse is offline   Reply With Quote
Old 01-08-2015, 08:17 AM   #37
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,408
Images: 5
Quote:
Originally Posted by BeachHouse View Post
Any thing new? Our 2005 25' International has high tire wear on the curb site on both tires. We do have GYM's. It is even across the treads. The street side tires still have plenty of tread left. The tires have been installed for 27 months. We figure we have about 20,000 miles on all of the tires (same age). Discount Tire had no answer. They suggested replacing the two worn tires and put the new ones on the back axle and then put the less worn street side tires on the front axle.

We have a TPMS since we got the new tires so I know the pressure and temps are consistent. We had been running at 65#, but recently have let them go down to 60# (opinion seems to vary as to whether to keep them at the max or adjust based based on load).

I would appreciate any thoughts?
Have you weighed the trailer side to side? Barring any pressure concerns and tire construction anomalies, weight is the only thing that comes to mind. You state even tire wear across the tread, so alignment is probably not the answer. Do you have pics?
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Old 01-08-2015, 08:28 AM   #38
4 Rivet Member
 
BeachHouse's Avatar
 
2005 25' International CCD
Lilburn , Georgia
Join Date: Dec 2011
Posts: 261
Blog Entries: 1
Haven't ever weighed it. And it isn't loaded differently than it has been in the past. A trip to the scales is in order. We are always in a hurry to get where we are going and don't stop.
__________________
BeachHouse is offline   Reply With Quote
Old 01-08-2015, 08:56 AM   #39
Rivet Master
 
boondockdad's Avatar
 
2008 30' Classic S/O
Dearborn , Michigan
Join Date: Aug 2006
Posts: 1,295
Images: 21
regular weighing is good a idea
I CAT every outing, and use my Sherline during loadout

but, I've never come across scales that had independent curb/street side plates
are they available publicly?
__________________
boondockdad is offline   Reply With Quote
Old 01-08-2015, 09:53 AM   #40
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,408
Images: 5
Quote:
Originally Posted by boondockdad View Post
regular weighing is good a idea
I CAT every outing, and use my Sherline during loadout

but, I've never come across scales that had independent curb/street side plates
are they available publicly?
Just run across with one side off the platform, on the "shoulder" of the scale pad. Align the axles as you would normally do for a single side axle weights. Repeat for the other side.
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Old 01-08-2015, 10:07 AM   #41
Rivet Master
 
boondockdad's Avatar
 
2008 30' Classic S/O
Dearborn , Michigan
Join Date: Aug 2006
Posts: 1,295
Images: 21
that would work but, I've found...

there's always piers holding sign or speakers
and
they're always on a raised platform and a tilted trailer will throw off the readings

__________________
boondockdad is offline   Reply With Quote
Old 01-08-2015, 10:11 AM   #42
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,408
Images: 5
Quote:
Originally Posted by boondockdad View Post
that would work but, I've found...

there's always piers holding sign or speakers
and
they're always on a raised platform and a tilted trailer will throw off the readings

Hmmm, I've only weighed once side to side, but the CAT scale I went to had plenty of clearance. IIRC, there was about 2.5 - 3' of shoulder outside the the scale pads and plenty of clearance to the piers. You just need the AS tires barely off the pad. All of the truck tires were on the pad. Check for other sites. I suppose (in your pic, you might have to back up and crank the wheel to drive off, but I didn't.
__________________

__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g 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
Uneven tire wear Lumatic Tires 7 07-19-2012 10:08 AM
WD bars uneven load - equalizer hitch flmgrip Hitches, Couplers & Balls 16 05-25-2010 09:06 AM
Uneven (rutted) road surface dkottum Hitches, Couplers & Balls 6 11-11-2009 09:18 PM
uneven tire wear 64globetrot Axles 4 09-13-2009 03:01 PM
Uneven tire wear..Yikes!! daydreamer36535 Tires 18 07-09-2007 11:17 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:59 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.