Off tracking is the correct term used to describe the phenomenon where the rear wheels of a vehicle do not follow the same path as the front wheels. It is a common issue in vehicles, especially those with a long wheelbase or multiple axles. Off tracking can be caused by various factors such as vehicle design, steering geometry, road conditions, and load distribution.

Factors causing off tracking:

1. Vehicle Design:
- Wheelbase Length: A longer wheelbase can lead to increased off tracking as the distance between the front and rear wheels is greater.
- Rear Overhang: Vehicles with a longer rear overhang are more prone to off tracking as the rear wheels are further behind the front wheels.
- Axle Spacing: If the distance between the axles is not properly aligned, it can lead to off tracking.

2. Steering Geometry:
- Toe Angle: If the toe angle of the rear wheels is not properly aligned with the front wheels, it can cause the rear wheels to deviate from the intended path.
- Camber Angle: Improper camber angle can also contribute to off tracking, especially during cornering.

3. Road Conditions:
- Uneven Surfaces: Rough or uneven road surfaces can cause the rear wheels to bounce or lose contact with the ground, resulting in off tracking.
- Banked Turns: When a vehicle is traveling on a banked curve, the rear wheels may experience different forces compared to the front wheels, causing off tracking.

4. Load Distribution:
- Uneven Load: If the weight distribution of the load is not balanced, it can affect the vehicle's center of gravity and result in off tracking.
- Overloaded Rear: When the rear of the vehicle is overloaded, it can cause the rear wheels to shift and deviate from the desired path.

Effects of off tracking:

1. Reduced Stability: Off tracking can reduce the stability of the vehicle, especially at high speeds or during maneuvers.
2. Increased Tire Wear: The misalignment between the front and rear wheels can cause uneven tire wear, leading to premature tire damage.
3. Difficulty in Maneuvering: Off tracking can make it harder to navigate through narrow spaces or make sharp turns.

To minimize off tracking, proper vehicle design, regular maintenance, and correct alignment of the wheels are essential. It is important for vehicle operators to be aware of off tracking and adjust their driving accordingly to ensure safe and efficient operation.