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01-20-2021, 06:22 PM
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#1
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2 Rivet Member
1992 25' Excella
Sachse
, Texas
Join Date: Jul 2020
Posts: 27
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Axle Capacity Question?
I have a 92 25' Excella and I need new axles. I can't find any info on the current axles to determine what the original specs were. My GVWR is 6800lbs. What load rating should I get for my axles? 3500lbs each? Do you match your GVWR or rate them a certain percentage over?
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01-20-2021, 06:42 PM
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#2
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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Dexter' website has some good information on axle rating selection. You want to get them close to the actual max load the axles will see because torsion bar tensioning and brake preloads are matched to the load ratings. When you go to spec them out, a call to their tech support is a good idea. In general you want to start with GVWR and subtract 10% as the minimum tongue weight. Thus 6,120 is in the ballpark, but as I say Dexter is happy to help you pick the best numbers. You do not have to get the standard stocked ratings, you can custom order.
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01-20-2021, 08:57 PM
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#3
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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Quote:
Originally Posted by BayouBiker
Dexter' website has some good information on axle rating selection. You want to get them close to the actual max load the axles will see because torsion bar tensioning and brake preloads are matched to the load ratings. When you go to spec them out, a call to their tech support is a good idea. In general you want to start with GVWR and subtract 10% as the minimum tongue weight. Thus 6,120 is in the ballpark, but as I say Dexter is happy to help you pick the best numbers. You do not have to get the standard stocked ratings, you can custom order.
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I'm not quite sure they are quite that ....um...precise. first of all AS spec'd 5000# axles for my 10k gvwr trailer...not the Roughly 4500 pounds they carry (max).
Second, when I called dexter a number of years ago, sent them a pic of my axle tag, they told me they hadn't ever produced a 5000# axle. I had 6k axles labelled for AS build.
Take that at face value, but that's what I was told.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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01-21-2021, 06:21 AM
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#4
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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Rich have a look at the Dexter technical section of their website. What Airstream orders and installs for their production runs seems to vary. My 7300 lb GVWR trailer has 3500# axles. According to Dexter they can be custom ordered or you can go with the shelf stock ratings.
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01-21-2021, 06:47 AM
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#5
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Rivet Master
1988 25' Excella
1987 32' Excella
Knoxville
, Tennessee
Join Date: Oct 2010
Posts: 5,095
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My 1988, 25' Excella has a 6800 lb gross weight rating and has 3200 lb axles.
For the record the times I have weighed it loaded for traveling we had 5600 lbs on the axles. I guess we do not carry as much stuff as some. And if it is heavy it goes in the truck. Is yours still the narrow body trailer or is it a wide body? That wold make a difference.
You really should take your trailer across a CAT scale before buying axles. Then you would know.
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01-21-2021, 06:49 AM
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#6
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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Welcome Aboard👍
Quote:
Originally Posted by Goondog
I have a 92 25' Excella and I need new axles. I can't find any info on the current axles to determine what the original specs were. My GVWR is 6800lbs. What load rating should I get for my axles? 3500lbs each? Do you match your GVWR or rate them a certain percentage over?
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Upgrade....We had two OEM 3500lb axles on our 7300lb GVWR Classic, with a meager 676 cargo capacity.
After 17yrs of 'kid gloving" them we upgraded to 4000lb, standard bearing, auto adjust, (I don't trust any mechanical device that has the werd " NEVER" in it.
Better to have more and need less than not having more when you need it.
Bob
🇺🇸
__________________
"You don't know where you've been until you leave, enjoy life" RLC
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01-21-2021, 06:59 AM
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#7
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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Quote:
Originally Posted by BayouBiker
Rich have a look at the Dexter technical section of their website. What Airstream orders and installs for their production runs seems to vary. My 7300 lb GVWR trailer has 3500# axles. According to Dexter they can be custom ordered or you can go with the shelf stock ratings.
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Oh, I know, and as I said, this was a number of years ago....and on a 2007.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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01-21-2021, 06:59 AM
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#8
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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IDK, Bob there are two schools of thought on that. Dexter axles have structural ratings and having a margin on that is good as long as they remain under the structural rating of the frame. You want the axle flex to be somewhat matched to the frame. The final rating of the axles will depend on the torsion preload and thus the spring rate. The suspension will perform best and provide the least stiff and be most gentle on the trailer and content with spring rates matched the maximum expected max load, but they will wear out bit sooner.
Your 3500 lb axles for your 7300 lb classic was a good match.
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01-21-2021, 07:11 AM
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#9
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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Quote:
Originally Posted by BayouBiker
IDK, Bob there are two schools of thought on that. Dexter axles have structural ratings and having a margin on that is good as long as they remain under the structural rating of the frame. You want the axle flex to be somewhat matched to the frame. The final rating of the axles will depend on the torsion preload and thus the spring rate. The suspension will perform best and provide the least stiff and be most gentle on the trailer and content with spring rates matched the maximum expected max load, but they will wear out bit sooner.
Your 3500 lb axles for your 7300 lb classic was a good match.
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I beg to differ....Not a match with a pooped CCC.👎
We have had as much at 7800lb on the AS axles.
POI our adult beverages can weigh 200lb😂
Bob
🇺🇸
__________________
"You don't know where you've been until you leave, enjoy life" RLC
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01-21-2021, 07:26 AM
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#10
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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I wonder why someone would knowingly exceed the GVWR by so much. I also don't see how increasing spring rate necessarily safely increases GVWR and thus CCC. It might, but perhaps other components contribute to the 7300 lb limit.
Two 3500 lb axles are indeed a good match for a trailer with a 7300 lb GVWR. They may not be a good match for an owner who wants to load the 7300 lb GVWR trailer to 7800 lb.
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01-21-2021, 07:46 AM
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#11
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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So...what you are saying is that you would be satisfied with a 676 pound AS cargo capacity?
I was advised by both Dexter & JC that 4200lb would work very well. They were not available without the 'never-lube' bearings so I went with the 4000lb.
POI...Explain then, why do todays axle ratings more closely match the GVWR.
My observation...JC realized that an AS with such a poor CCC was NOT a good selling point.
Bob
🇺🇸
__________________
"You don't know where you've been until you leave, enjoy life" RLC
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01-21-2021, 08:58 AM
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#12
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Rivet Master
2009 34' Panamerica
2005 28' Classic
Still
, in the thick of it
Join Date: Jan 2018
Posts: 677
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Quote:
Originally Posted by BayouBiker
I wonder why someone would knowingly exceed the GVWR by so much. I also don't see how increasing spring rate necessarily safely increases GVWR and thus CCC. It might, but perhaps other components contribute to the 7300 lb limit.
Two 3500 lb axles are indeed a good match for a trailer with a 7300 lb GVWR. They may not be a good match for an owner who wants to load the 7300 lb GVWR trailer to 7800 lb.
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I agree with a lot of what you say here Brian, but for example, 2nd half of 2005 Aistream changed the axles, so say a 6300lb GVWR trailer that had 500bs of NCC and 3000lb axles, got bumped to 3500lbs axles and then got a roughly 7300lb GVWR and the NCC went up exponentially. I was at the factory and inspected the frames prior and post switchover and I can tell you that from my viewpoint (again not scientific) the only thing that provided an increase in GVWR and NCC appears to have been solely on the axle upgrade. Point of ref, unrelated. You can tell typically by look of a 2005 2nd half by the taller rock guards, they did that upgrade at the same time the axles were up'd. Post 2005, I can't say, it's been about 10 years since I was at the factory last.
My axles are getting weak, and so when it comes time to replace I will be doing similar to what Robert did. In my case, my 2005 with no other foreseeable mods from the factory, went up by almost 500-800lbs of GVWR and NCC, so there really isn't an overloading issue unless you go very grossly overboard as the factory re-certified the exact same trailer post axle change. Unless the factory cut corners or did some mods I am not aware of, my thought is was the axles that were hold the capacities lower.
When I spoke to the factory a bit ago, they told me there was no way the would put the same capacity axles on my trailer that it was standard to put slightly higher capacity axles on, which does fall in line with what Robert is talking about.
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01-21-2021, 09:33 AM
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#13
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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Quote:
Originally Posted by ROBERT CROSS
So...what you are saying is that you would be satisfied with a 676 pound AS cargo capacity?
I was advised by both Dexter & JC that 4200lb would work very well. They were not available without the 'never-lube' bearings so I went with the 4000lb.
POI...Explain then, why do todays axle ratings more closely match the GVWR.
My observation...JC realized that an AS with such a poor CCC was NOT a good selling point.
Bob
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You may be reading too much into my comments. I might suggest you take them literally at face value. Other than to refer back to the two schools of thought on spring rate selection, I don't have an explanation for what motivates Airstream designers.
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01-21-2021, 11:15 AM
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#14
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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I may, but I doubt it.
A CCC of 676 just wasn't a rational choice for a 25' AS.🤔
Bob
🇺🇸
__________________
"You don't know where you've been until you leave, enjoy life" RLC
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01-21-2021, 01:03 PM
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#15
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Rivet Master
1986 31' Sovereign
Miami
, Florida
Join Date: Feb 2004
Posts: 3,137
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What model of 25’ Airstream carries 60 gallons of fresh water? My FB27 carries 37...
__________________
Sorta new (usually dirty) Nissan Titan XD (hardly paid for)
Middle-aged Safari SE
Young, lovely bride
Dismissive cat
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01-21-2021, 01:17 PM
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#16
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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Quote:
Originally Posted by n2916s
What model of 25’ Airstream carries 60 gallons of fresh water? My FB27 carries 37...
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WELL...our '04 25' Classic carries 54gal.
Bob
🇺🇸
__________________
"You don't know where you've been until you leave, enjoy life" RLC
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01-21-2021, 01:50 PM
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#17
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Rivet Master
1986 31' Sovereign
Miami
, Florida
Join Date: Feb 2004
Posts: 3,137
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WOW! Even my old ‘31 only carried 40. Great for boondocking I bet.
__________________
Sorta new (usually dirty) Nissan Titan XD (hardly paid for)
Middle-aged Safari SE
Young, lovely bride
Dismissive cat
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01-21-2021, 02:07 PM
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#18
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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Quote:
Originally Posted by n2916s
WOW! Even my old ‘31 only carried 40. Great for boondocking I bet.
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Yes...with very judicious usage we have gone 10days without a re-fill.
Bob
🇺🇸
__________________
"You don't know where you've been until you leave, enjoy life" RLC
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02-27-2021, 08:38 AM
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#19
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2 Rivet Member
1992 25' Excella
Sachse
, Texas
Join Date: Jul 2020
Posts: 27
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I ended up going with 3500 lb axles per the suppliers recommendation. I took measurements and ordered them with a 3" lift through Redneck Trailer. They were ready for pickup in 4 weeks. The guys are Redneck Trailer were great to work with and very helpful.
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06-17-2021, 05:21 PM
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#20
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Rivet Master
2005 31' Classic
Garner,
, North Carolina
Join Date: Oct 2012
Posts: 1,031
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you are able to buy your axles through redneck directly?? not through a secondary dealer?? when you ordered were you given a pickup date and was that mostly accurate?
We will be traveling next year and was going to have the axles for pickup at RN location in Idaho.. should i call that location to do the order?? i have the dexter order form ready to go.. how did you get the order info ton RN trailer guys. PDF?? thanks
Quote:
Originally Posted by Goondog
I ended up going with 3500 lb axles per the suppliers recommendation. I took measurements and ordered them with a 3" lift through Redneck Trailer. They were ready for pickup in 4 weeks. The guys are Redneck Trailer were great to work with and very helpful.
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__________________
Carl, Raleigh NC
2-24-16 got a 2005 Classic 31D 460 watts solar, lithium 230 AH, 16" LT's, pulled by:
2003 F-250 SD, CC, 7.3L PowerStroke
WBCCI#1691, Piedmont Airstream Club, Unit #161, Region #3
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