Good Sam Club Open Roads Forum: Travel Trailers: Axle upgrade questions
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kfp673

PA

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Posted: 06/03/21 07:01am Link  |  Quote  |  Print  |  Notify Moderator

JIMNLIN wrote:

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Adding more info from sticker on side..

GVWR 10500 Lb
GAWR 5080lb each
Tires ST225/75R15 D Planning to upgrade to goodyear E range
Axles Dexter 184357 5200lb

Sound like the mfg used 5200 lb axle and then derated them with 5080 lb springs.
Any wayz....the trailer may weigh 10000 lbs fully loaded. Now subtract hitch weight = around 1400 lbs leaves 8600 lbs on the axles or 2150 lbs per tire.
Several reasons a trailer can have too much axle/tire capacity.
You really need to weigh the combo on a set of CAT scales for your trailers axle weights or just use a certified single platform scales with just the trailer axle on the platform. That way you will know what you have and what you need....and don't need.

My 1997 5th wheel rv trailer has 5200 lb axles and around 2500 lbs per tire capacity requirements.
This trailer has lots of miles on it with 51k and 55k miles the first two sets and at 48k I'm looking to replace them now with the same LT215/85-16 E at 2680 lb capacity per tire. Ran the first set for 7 years and 55k miles with no issues other than keeping them pumped to full 80 psi sidewall pressures 352 days a year.
I use Firestone LT Transforce HT or Cooper LT Discoverer HT-3 and BFG LT Commercial TA 2 .
Edit; add tire brands /sizes.........jim


Great info. Thanks for the post and education! So my 5200lb axles may not be undersized since I did not calculate the tongue weight. Great point. I still have the issue of excessive inside tire wear. I need to replace these tires ASAP and am in the process of doing so since we have multiple trips planned over the coming weeks, but I am concerned that over another 10k miles this new set will be destroyed just like the factory tires. I checked with 2 trailer shops in my area (shops that sell heavy duty and standard commercial grade trailers) and neither do axle / trailer alignment as a service. Not sure where to go from here.

Lynnmor

Red Lion

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Posted: 06/03/21 07:16am Link  |  Quote  |  Print  |  Notify Moderator

kfp673 wrote:

So my 5200lb axles may not be undersized since I did not calculate the tongue weight.


The fact that you have an axle that no longer is bowed up tells me the axle is not adequate.





kfp673

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Posted: 06/03/21 07:29am Link  |  Quote  |  Print  |  Notify Moderator

One more question for this thread... As you all know, when you have an issue it's easy to get sucked into internet rabbit hole world. While digging around I am also reading some posts from people with similar tire wear issues saying their suspension bushings were totally shot and that once replaced with the heavy duty wet kit it solver their issues. I'm not sure how those bushings would effect tire wear but is this accurate? If so, I just completed this upgrade a month ago or so ago, and my factory nylon bushings were beyond shot. They were basically non-existent. Performing this upgrade was when I noticed how bad the tire wear was. They are now all upgraded with the brass bushings. I wonder if that might help my situation??

Regarding the post about axle bend, I should actually withdraw that until I get a better look on flat and even surface. The way it is sitting right now it is uneven ground and the axle I was referring to wheels are actually sitting lower than the front. I will look closer when I move it to level ground so I am not assuming anything. Thanks!

ivbinconned

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Posted: 06/03/21 07:39am Link  |  Quote  |  Print  |  Notify Moderator

As an owner operated off a trailer shop and owning several trailers with different types of axels I can tell you that on our own fifth RV about the same weights I do an “alignment” every year.
Save your money. There is nothing wrong with your axels capacity. It is out of alignment from pot holes and tight turns.
If you are bent on doing an up grade, change the whole system out for a torflex suspension. The improvement in ride and towing is huge.


Ram and 34 ft Cedar Creek

ivbinconned

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Posted: 06/03/21 07:41am Link  |  Quote  |  Print  |  Notify Moderator

Just remembered...I’d did replace my springs and went to a set with one more leaf.

Huntindog

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Posted: 06/03/21 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

ivbinconned wrote:

Just remembered...I’d did replace my springs and went to a set with one more leaf.
Have you weighed it loaded?
If not, then you should. It likely weighs more than you think..... If you do it now... No cheating going for a good weigh...Load it heavy like for a big long trip. You need to know the truth. Then youcan decide what to do about it.



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JIMNLIN

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Posted: 06/03/21 07:04pm Link  |  Quote  |  Print  |  Notify Moderator

673.....
Yes worn bushings can cause all types of tire wear....then add a axle with the wrong camber and some odd patterns really show up.
Your best option for axle R&R on your trailer is a big rig trailer repair shop. They can replace any suspension part....add a spring in the pack....make suggestions....and bend the axle stub or the axle stub back to specs or replace the whole axle assy.

You really need to get your trailer axle weights before spending money on a over loaded axle.


"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers

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kfp673

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Posted: 06/04/21 07:08am Link  |  Quote  |  Print  |  Notify Moderator

JIMNLIN wrote:

673.....
Yes worn bushings can cause all types of tire wear....then add a axle with the wrong camber and some odd patterns really show up.
Your best option for axle R&R on your trailer is a big rig trailer repair shop. They can replace any suspension part....add a spring in the pack....make suggestions....and bend the axle stub or the axle stub back to specs or replace the whole axle assy.

You really need to get your trailer axle weights before spending money on a over loaded axle.


Ya, this is the direction for sure. Per my earlier post, I was struggling to find a shop, but I kept digging around and finally found a shop that specializes in frame and axle alignment and many other items. It's an hour from home and the process is expensive, especially if axle bending is required, so getting all of the accurate data prior is the only way to fly.

Thanks again all

kfp673

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Posted: 06/08/21 12:14pm Link  |  Quote  |  Print  |  Notify Moderator

Went ahead and replaced the 4 tires with Maxxis 10ply. Had them mounted and re-installed them yesterday. Also have an appointment with a truck shop that can do axle alignment to have them evaluate what else needs to be done. The only other thing that worries me is when I did the CRE3000 with heavy duty shackle and wet bolt kit, the brass bushings were all very easy to put in. Prior to installing I watched videos and some needed a press to put them in. Mine all went in by hand easily. I hope that does not mean the springs are worn as well as I intend to keep them. The factory bushing were totally destroyed when I replaced them but with a 3 yr old trailer I sure hope the suspension work is limited to the axles and that the brass bushing upgrades I did are enough.

Thanks again all for your thoughts and help.

Huntindog

Phoenix AZ

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Posted: 06/08/21 12:18pm Link  |  Quote  |  Print  |  Notify Moderator

kfp673 wrote:

Went ahead and replaced the 4 tires with Maxxis 10ply. Had them mounted and re-installed them yesterday. Also have an appointment with a truck shop that can do axle alignment to have them evaluate what else needs to be done. The only other thing that worries me is when I did the CRE3000 with heavy duty shackle and wet bolt kit, the brass bushings were all very easy to put in. Prior to installing I watched videos and some needed a press to put them in. Mine all went in by hand easily. I hope that does not mean the springs are worn as well as I intend to keep them. The factory bushing were totally destroyed when I replaced them but with a 3 yr old trailer I sure hope the suspension work is limited to the axles and that the brass bushing upgrades I did are enough.

Thanks again all for your thoughts and help.


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