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Old 06-19-2014, 10:31 AM   #11
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These units are engineered very tightly to fit them into what most people tow them with. The axles are right at what is required; but so are the frames and wall structures.

If you replaced the axles with stronger units you will NOT change the maximum weight they will carry since the frame and side walls would also need to be stiffened to carry the extra load.

The GVWR is a dance to try to give the most "features" at the LEAST possible weight. That means structure has to be at a minimum to keep the towable weights low.

Cabinetry is designed with the minimum amount of wood; the frame with the minimum amount of steel, the axles the minimum amount to carry that designed weight; and the axles/tires sized for the targeted GVWR less that carried by the tongue/pin.

If you want to "tow with your 1/2 ton," there are choices that have to be made.

If they engineered a trailer that can safely handle 1000 pounds more than the GVWR; they would increase the GVWR so that they could market it that way.
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Old 06-19-2014, 11:24 AM   #12
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Originally Posted by f1100turbo View Post
I think also primarily they run the axles to minimum to minimize user overloading.
If they put 4 k axles under a camper with a gvw of #7000 people would think they could use that extra 1 k,
so they put the appropriate axle under it to discourage that.

WHICH is why it's NOT ok to put heavier axles under your trailer.
I think it's to save money. My 1,500 lb. 2007 Starcraft has 3,500 lb. axles.
My 3,000 lb. (GVWR) 2012 Coachmen has 3,000 lb. axles.

I see no downside to putting better/stronger axles on. You put on higher load-rated tires, right?
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Old 06-19-2014, 11:27 AM   #13
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It is on the TT to do list to move up to D range tires. But then I need to find out if the wheels can handle the 80 lbs pressure.
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Old 06-19-2014, 11:33 AM   #14
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It is on the TT to do list to move up to D range tires. But then I need to find out if the wheels can handle the 80 lbs pressure.
Quite possibly not.
Look for ratings on the rim.
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Old 06-19-2014, 11:35 AM   #15
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If they are 14's like mine are, VERY difficult if not impossible to find a D rated tire in a 14 radial. I searched e bay a while back and ended up buying more C rated tires. Most are also made in China as well!!! Randy
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Old 06-19-2014, 11:38 AM   #16
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Originally Posted by 08flagvlite View Post
If they are 14's like mine are, VERY difficult if not impossible to find a D rated tire in a 14 radial. I searched e bay a while back and ended up buying more C rated tires. Most are also made in China as well!!! Randy

My last unit had 14's and bought some khumo's 857 D rated from tire rack- liked them a lot. Had to go from a 205 to a 195 though-not a huge difference.
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Old 06-19-2014, 11:43 AM   #17
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We have a goodyear dealer right down the road from our house. Was in there a couple of days ago with my son to get an alignment on his MR2...asked the manager about RV tires. Was delighted to find out that:
1. Yes Goodyear makes RV tires
2. The tires are one of the last brands to be made in the USA!
3. They offer a replacement hazard warranty!

Goodyear RV Tires €“ Tire Selector

Will be getting rid of my China Bombs RSN!

Oh, forgot to mention that Goodyear offers a G rated tire - that is a lot of tire for a Ultra Lightweight (Tire Size: LT235/85R16 Max Load at 110PSI is 3750 )
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Old 06-19-2014, 12:35 PM   #18
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Originally Posted by HONDAMAN174 View Post
It is on the TT to do list to move up to D range tires. But then I need to find out if the wheels can handle the 80 lbs pressure.
D range tires are 65 PSI and your steel rims should be OK.
E range tires are 80 PSI.
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Old 06-19-2014, 02:05 PM   #19
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I see no downside to putting better/stronger axles on. You put on higher load-rated tires, right?
That's because the trailer's total original GAWR is the limiting factor - or weakest link. Unlike axles, tires have variable parameters - lose a little air pressure causes loss of load capacity. It's always nice to have a little extra load capacity in your tires.

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Old 06-19-2014, 02:40 PM   #20
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But where does it stop?

Upgrade the tires; GVWR does not change; payload stays about the same.
Upgrade the axles; GVWR does not change, BUT payload goes DOWN due to heavier axles.
Upgrade the frame; GVWR STILL does not change because the walls are not built to handle the stress of a heavier load, PAYLOAD goes down even more.
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