The other day we found ourselves at a fabulous RV dealership in Missoula, Montana: Bretz RV and Marine on I-90. This is a huge place that has a mammoth inventory of trailers and motorhomes that spills over several lots. What a great spot to go RV shopping!
We LOVE RV shopping and have been at it for over ten years!
But what brought us here? Well, the 99 cents per gallon propane deal they are offering was one thing, and the free and extremely well laid out RV dump station was another. What a place!
After we’d dumped and gotten our propane, we decided to have a look around the RV lots and check out some of the very pretty RVs. Bretz has an enormous selection of Airstream trailers, and we got a huge kick out of seeing a few up close. Beautiful!
I have written a little about what to look for in an RV for full-time living, and one of the things that a lot of new RVers don’t realize when they go shopping is how important it is to get a trailer with an adequate Cargo Carrying Capacity.
Cargo Carrying Capacity is the difference between what the RV weighs when there is nothing in it (the “Unloaded Vehicle Weight” or UVW) and what it weighs when you have loaded it down with all of your personal belongings plus food, water and propane as well as upgrades like solar power, washer/dryer, a big battery bank, a generator, a bike rack and bikes, etc., (the “Gross Vehicle Weight” or GVW).
It is important not to exceed the Cargo Carrying Capacity!
If you do, then you’ve gone over the trailer’s GVWR (“Gross Vehicle Weight Rating”) which is the maximum safe weight for the trailer when it is fully loaded.
On older trailers the GVWR is posted on a sticker that is placed on the outside of the trailer up near the front on the driver’s side. On newer trailers there is usually another sticker that indicates the Cargo Carrying Capacity.
A few weeks after we moved into our 36′ Hitchhiker fifth wheel trailer back in 2008, we took it to a truck scale. We reported on this blog at the time that it weighed 13,850 lbs. This was close to the trailer’s GVWR of 13,995, but not over.
Phew!! We had lived in it a very short time and had filled the cabinets only 1/3 of the way!
After we finished our sailing cruise of Mexico in 2013, we had to squeeze our lives back into our trailer, and we had a tough time getting rid of all the wonderful things we’d picked up from sailing.
So we had our trailer weighed using the Escapees Smartweigh Program at the Escapees RV park at North Ranch near Wickenburg, Arizona. Our trailer had gained 250 lbs. and now weighed 14,100 lbs. The weight on our rear axles was 11,250 lbs.
The trailer was built with two 7,000 lb. axles. It also came from the factory with E-rated (10-ply) tires that were rated to carry 3,032 lbs. apiece, or 6,084 lbs. per pair on an axle.
When it comes to GAWR (“Gross Axle Weight Rating”), the axles are rated according to the weaker component, whether it is the axles or the tires. So our GAWR was 6,084 lbs. due to the E-rated tires. However, by upgrading to G-rated (14 ply) tires that are rated to carry 3,960 lbs. each, or 7,920 lbs. all together, the weak link became the axles themselves rather than the tires. So our GAWR was now 7,000 lbs. due to the axles.
Either way, the 11,250 lbs. actual weight we had on our axles was well within both the original axle rating of 12,780 lbs for the pair (6,084 per axle x 2 axles = 12,780) and the new axle rating of 14,000 lbs for the pair (7,000 per axle x 2 axles = 14,000 lbs).
Our Escapees Smartweigh weighing revealed that our old 2007 Dodge Ram 3500 single rear wheel truck was overloaded. After we upgraded to our new 2016 Dodge Ram 3500 dually, we went to a truck scale two more times to see how we were doing.
We knew the trailer weight was well within the towing capacities of the new truck, but we had had to replace a trailer axle in August 2015 and then replace the entire trailer suspension (ugh!) in October of 2015. Needless to say, we were concerned about the weight on the trailer axles.
When the trailer was weighed this time around, the weight on the trailer axles had increased to 11,600 lbs., 350 lbs. higher than two years earlier, but still well within the limits of the 14,000 lbs. that the axles and tires could carry.
We didn’t weigh the truck and trailer separately, so we don’t have a figure for the overall trailer weight yet. However, my suspicion is that the extra 350 lbs. on the axles means our 14,100 lb. overall trailer weight has increased by 350 lbs. to about 14,450 or so. This means the trailer is 455 lbs. or so over the its GVWR of 13,995 lbs.
Besides being overweight, we’ve learned something important from this.
The UVWR (“Unloaded Vehicle Weight Rating”) on our trailer is 10,556 lbs. Since 13,995 GVWR – 10,556 UVW = 3,439, this means the Cargo Carrying Capacity of our trailer is 3,439 lbs. That’s a little above average for most fifth wheel trailers.
However, if our trailer’s true weight is now 14,450 lbs., then the cargo we are actually carrying weighs 3,894 lbs (because 14,450 True Weight – 10,556 UVW = 3,894 Actual Cargo Weight).
So, what this means is that for us to live in our trailer comfortably over a period of many years, as we have done, we need a trailer with a Cargo Carrying Capacity of around 4,000 lbs. Other RVers may have different requirements.
Frankly, if we were to buy a new trailer, we would be looking for a Cargo Carrying Capacity of at least 5,000 lbs.
We dry camp 100% of the time, so we always tow the trailer with the fresh water tank full (since we will need a full tank when we set up camp). Water weighs 8.3 lbs. per gallon. So, our 70 gallons in the fresh water tank and 10 gallons in the hot water heater, weigh 664 lbs.
Our waste tanks are empty when we travel.
RVers who don’t dry camp at all can travel with as little as 20 gallons or so of water all together between the fresh water tank and hot water heater, or 166 lbs. of water weight instead of 664 lbs. like we have.
So, what does all this have to do with our RV window shopping at Bretz RV & Marine the other day?
Well, whenever we go RV window shopping, we routinely check the weight capacity sticker on every trailer we look at, because overall GVWR and Cargo Carrying Capacity are just as important to us as the kitchen and living room layout. And while we were checking out cool new trailers, we got a big surprise…
I LOVE little trailers, and I was smitten by a sweet tear drop trailer called the Little Guy Rough Rider.
What a fun little trailer! It even has a cute saying on the back…
We also really liked a big Redwood fifth wheel.
It was a monster with two exterior doors and five slides. Wow!!
Well, which one do you think can carry a heavier load — the little weekend trailer that is just a bed on wheels with a wee mini-kitchen on the back, ideal for summer camping, or the big “full-time,” four season fifth wheel trailer that might replace someone’s house??
Ahem, not the trailer you’d think.
The stickers on these two trailers gave the following:
Rough Rider Teardrop Trailer Cargo Carrying Capacity: 1,925 lbs.
Redwood Full-timer Fifth Wheel Trailer Cargo Carrying Capacity: 1,876 lbs.
Reeling from this sticker shock, we wandered around the RV dealership lot a little more and found a wonderful big fifth wheel toy hauler.
This triple axle behemoth had three slides and was built to carry big toys with motors, like ATVs, motorcycles, and other goodies.
Like all toyhaulers, it had a big door in the back that would drop down to become a ramp so you could roll out on your ATV or motorcycle with ease.
So this big guy was built to haul a big load, right?
Well, not exactly. It has a Cargo Carrying Capacity of 2,302 lbs. That is just a little more than the Little Guy Rough Rider teardrop!
The sticker on this toy hauler makes it very clear that when the trailer’s fresh water tank and hot water tank are both full, then the Cargo Carrying Capacity drops to 1,372 lbs.
So, your clothes, food, generator, on-board gas tank, propane tanks and your big toys like your ATV or motorcycle can’t weigh more than 1,372 lbs. all together if you wish to dry camp. If you are going to get hookups, then your limit will be 2,302 lbs., still a very tight squeeze if your toys weigh a few hundred pounds.
I’m not advocating one RV brand over another or knocking any particular RV brand with this info. Far from it! These specs and stickers come from random trailers that appealed to us and that happened to be on the dealership lot the day we were there.
When we have wandered through other RV dealership lots in different states at other times, we have discovered that many very popular brands have similar specs.
The important thing is that if you are shopping for a trailer that you are going to tow a lot, you should try to estimate how much weight you will put into it, including however much fresh water it will have in it when you hitch up. Then make sure the trailer you buy has sufficient cargo carrying capacity.
Unsure what your stuff weighs?
You can use a bathroom scale to get a rough estimate of what your clothes weigh by putting your laundry basket on it or weighing yourself holding your laundry basket and subtracting out your weight. You can also grab a bunch of clothes/jackets on hangers and do the same thing.
Likewise after a big grocery shopping spree — weigh yourself holding bunches of bags of groceries before you put it all away. Then look at what you already have in the fridge and pantry. The same can be done with pots and pans, dishware, tools, shoes, bikes etc. And don’t forget any upgrades you plan to do to the trailer after you buy it.
Or use our numbers as a guideline. We still haven’t filled all the shelves in our fifth wheel!
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