[WapCar] The approach angle is the angle measured between a line tangent of the front tire and the initial point of structural interference forward of the front tire to ground, when the vehicle is stationary and fully loaded. Any rigid component fixed on the vehicle shouldn't be lower than this tangent line (especially the winch on some off-road vehicles).
The approach angle applies when going uphills. When the front wheels of the vehicle approach at a slope, the approach angle guarantees the front bumper or other strutural components not to be stuck on the slope. The larger the approach angle is, the steeper the slopes a vehicle can move up, without damaging the front bumper.
The approach angle is an important feature, not only for SUVs, but also for sedans. Driving up curbs, slopes or ferries needs an appropriate departure angle to avoid damage to the front bumper of the car.
The Measurement of the Approach Angle
When a vehicle is stationary and fully loaded on a level ground, the maximum acute angle between the level ground and the tangent line of the front tire below any strutural component forwards. Notice that some models may have adjustable ride heights, hence the approach angle is variable with these models.