How to weigh an RV and read the scale tickets
Weigh an RV in its intended travel condition, then compare the measured loads with the actual vehicle, axle, hitch and tire ratings. For a conventional trailer, a weight-distribution hitch changes axle readings. Its engaged reading cannot be used as the unadjusted tongue-weight measurement.
Keep the load identical between passes
Record fuel, water, occupants, cargo and hitch hardware. Ask the scale operator how the vehicle can be positioned and where any permitted coupling changes can happen. Do not unhitch on a scale platform or block traffic without authorization.
Use a procedure permitted by the vehicle and hitch instructions. If a weight-distribution-off pass cannot be made safely, arrange a suitable weighing service or approved direct tongue measurement. Do not travel with required equipment disabled to obtain a number.
| Pass | Condition | Readings used here |
|---|---|---|
| A | Tow vehicle alone; same occupants, cargo and hardware | Steer 3,200; rear 2,800 = 6,000 lb |
| B | Coupled; weight distribution untensioned where permitted | Steer 2,900; rear 3,900; trailer 5,200 lb |
| C | Travel configuration; weight distribution engaged | Steer 3,100; rear 3,500; trailer 5,400 lb |
Work the example before comparing limits
Pass B puts 6,800 pounds on the tow vehicle. Subtract pass A’s 6,000 to get an unadjusted tongue load of 800 pounds. Pass B totals 12,000; subtract the unhitched vehicle’s 6,000 to obtain the loaded trailer’s 6,000 pounds.
In pass C, the vehicle carries 6,600 pounds and the trailer axles carry 5,400. Those are the travel-condition loads to compare with the relevant ratings. Adding pass C’s trailer-axle reading to the unadjusted 800-pound tongue reading would incorrectly produce 6,200 pounds.
This is a worked calculation, not a claim that a particular hitch must transfer these amounts. Blue Ox describes the vehicle-alone versus coupled subtraction. Its hitch-selection load can also include cargo behind the vehicle’s rear axle; that selection calculation is different from measured trailer tongue load.
Axle-group totals cannot clear every tire
A multi-platform scale may report a tandem group together. That does not establish the load on each individual axle or wheel position. Do not drive partly off a platform to improvise a side weighing.
RVSEF explains wheel-position reporting and the need for the installed tire’s load/inflation table before load-based inflation changes. Follow the vehicle and tire instructions. Do not bleed a hot tire or replace the placard pressure with an unsupported estimate.
For a motorhome or fifth wheel, use the weighing service’s procedure for that configuration. Keep the tickets with the recorded ratings, and reweigh after material equipment or loading changes.