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Last changes 6/14/2008 |
One thing to do when you get your RV and anytime there is
significant changes to it or what you are carrying, is to have
it weighed. Only when you know your RV weight do you know if
your tires are adequate and at the proper pressure.
The only effective weighing of your RV is one where each wheel,
or dual wheel, is measured separately.
Weigh-It is a couple
who show up at numerous RV Rallies and Shows and will weigh your
rig in this manner.
RVSEF (RV Safety
Education Foundation) is another group that will also weigh your rig in this manner.
When we had our motorhome weighed, the front axle was in limits,
but we had all the tools located in a front left compartment,
the left front tire was just over limit. We moved the
tools and balanced the loading. This is why a per-wheel
weighing is necessary.
Below was the results when we had our rig weighed at RV
Life on Wheels in Moscow Idaho. First Red Rover was
weighed and then the whole rig was weighed.
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| RVSEF Results |
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| Truck Alone |
You will note that the
rig is not symmetrical in weight along its length.
An assumption that you can just take the trailer axle
weight and divide by 6 to get tire loading would be
incorrect. (17,825 / 6 = 2,936) because we have one
wheel with a 3,250 lb loading.
An E rated tire would be fine for the average 2,936 but
would be overstressed in the 3,250 pound position.
A G rated tire is needed for that position, and since all
the tires should be the same, all the tires need to be G
rated which is what we have.
Ideally we should try to balance the trailer by shift
loads. Unfortunately for us, the imbalance is due
to the weight of the three slides on the left side of the
trailer including the refrigerator, with only one slide
on the right side. There is not much we can do to
achieve balance.
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Left |
Right |
Axle |
| Front |
5,500 |
5,250 |
10,750 |
| Rear |
4,425 |
4,175 |
8,600 |
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Gross Truck Axle Weight |
19,350 |
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| Truck with Trailer |
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Left |
Right |
Axle |
| Front |
5,100 |
4,900 |
10,000 |
| Rear |
7,275 |
6,800 |
14,075 |
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Gross Truck Axle Weight |
24,075 |
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| Trailer |
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Left |
Right |
Axle |
| Front |
2,975 |
2,900 |
5,875 |
| Center |
3,250 |
2,725 |
5,975 |
| Rear |
3,175 |
2,800 |
5,975 |
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Gross Trailer Axle Weight |
17,825 |
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Trailer Pin Weight |
4,725 |
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Gross Trailer Weight
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22,550 |
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