What is the significance of weight distribution in commercial vehicles?

Weight distribution is critical in commercial vehicles as it directly impacts vehicle stability and the longevity of tires. Proper weight distribution ensures that the load is evenly spread across the axles, which helps maintain control, especially during turns and sudden maneuvers. A well-balanced vehicle is less likely to tip over or skid, improving overall safety.

Furthermore, when weight is evenly distributed, tires wear more evenly, promoting longevity. Uneven weight distribution can lead to excessive wear on certain tires, potentially necessitating earlier replacements and increasing maintenance costs. Balanced weight distribution not only enhances safety but also maximizes the efficiency of the vehicle's performance, providing a smoother ride and allowing for better handling.

As for the other choices, while weight distribution does influence fuel consumption, carrying capacity, and engine wear to some extent, its most significant and immediate impacts are seen in stability and tire durability, making option B the most relevant answer.