1.3 BASIC TERMS USED IN VEHICLE DIMENSIONS

1. Overall length.

It is defined as the distance measured between the extreme projection point  (i.e. front most and the rear most) of the vehicle in the parallel planes. The fitment of towing hook, spare wheel or any other additional attachment is not taken into consideration while measuring  overall length of the vehicle.

2. Overall width.

It is defined as the distance measured between the extreme projection points (i.e. left most and the right most) at right angles to the axis of the vehicle between the perpendicular planes. The side view mirrors, guard rails and direction indicators are not taken into consideration while measuring Over all width of the vehicle. 

3. Overall height.

It is defined as the distance measured between the ground surface and the top most projection point of the vehicle.

4. Wheel base.

It is defined as the distance measured between the vertical center line of the front wheel to the vertical center line of the rear wheel.

5. Wheel track.

It is defined as the distance measured between the center of the wheels on one side of the vehicle to the other side. In case of front wheels, it is known as front wheel track and in case of rear wheels, it is known as rear wheel track.

6. Overhang.

It is defined as the distance measured between the vertical center line of the wheel  (front or rear) to the extreme projection point (front most or rear most). In case of front wheels, it is called as front overhang and is defined as the distance measured between the front most point of the  vehicle and the vertical center line of the front wheel. In the similar way, rear overhang is defined as the distance measured between the rear most point of the vehicle and the vertical center line of the rear wheel.