TOWCHECK FIELD GUIDE
How to measure trailer hitch rise or drop
Measure the loaded tow vehicle and a level, disconnected trailer on the same level surface. The vertical difference between compatible receiver and coupler reference points indicates the nominal rise or drop to investigate.
What the terms mean
Rise moves the ball platform upward relative to the receiver; drop moves it downward. The measurement is a starting geometry—not an equipment selection—because the final connected height also reflects tongue load, suspension movement and the dimensions of the rated hitch components.
Worked example
Common mistakes
- Measuring the tow vehicle before adding normal passengers and cargo
- Comparing the top of one component with the bottom of another
- Selecting an unrated adjustable mount only because its holes match the calculated number
Frequently asked questions
Does the trailer have to be level?
Use the trailer manufacturer's level reference or instructions so the coupler measurement represents its intended travel attitude.
Why can the connected height differ?
Tongue load, suspension movement, tire pressure and component geometry can change the final position.
Can TowCheck choose a ball mount?
No. Match the geometry, ratings, shank, ball and installation requirements using current manufacturer documentation.
Primary references
These sources support terminology and general planning context. Use the current documentation for your exact vehicle, trailer and components.
Continue with your own numbers
Run the Complete Tow Check, use the scale worksheet, or review the calculation methodology.