Vehicle dimensions
Measure to the lowest relevant point at normal operating load.
Start from your vehicle
Fills wheelbase, clearance and overhangs; shows the factory angles to compare against
Factory figures for comparison:approach —°departure —°ramp-over —°not published for this vehicle
1Measure the vehicle
This symmetric model treats the limiting contact point as midway between the axles. A point elsewhere needs different geometry.
The bottom of the bar or bumper, not the diff.
The towbar tongue is normally the lowest thing back here.
2Explore changes
Why this asks for two numbers per end. An approach angle is set by the height of whatever hits first at the front and how far forward of the wheel centre it sits — not by ground clearance. Ground clearance is measured under the belly, which is far lower than the bar, so using it for approach and departure understates both badly. Ramp-over is a belly measurement, which is why it uses the clearance figure.
How the explored figures work: a spring lift raises the body, so the front and rear contact points rise with both lift and tyre radius. The belly point is usually the diff on a live axle, which rises with tyre radius but not with a spring lift — so only tyre gain is applied to ramp-over. On an independent front end the front diff is bolted to the body and does rise with a lift; if that is your limiting point, add the lift to the belly figure yourself.
Bars, towbars, steps, fuel tanks, suspension compression and load all change these numbers on a real vehicle. Measure at your normal touring weight, not empty.
How the explored figures work: a spring lift raises the body, so the front and rear contact points rise with both lift and tyre radius. The belly point is usually the diff on a live axle, which rises with tyre radius but not with a spring lift — so only tyre gain is applied to ramp-over. On an independent front end the front diff is bolted to the body and does rise with a lift; if that is your limiting point, add the lift to the belly figure yourself.
Bars, towbars, steps, fuel tanks, suspension compression and load all change these numbers on a real vehicle. Measure at your normal touring weight, not empty.