Why engineers have preferred to use Six or eight wheels for heavy vehicles?

Engineers prefer six or eight wheels for heavy vehicles to enhance stability and load distribution. More wheels allow for better weight management, reducing the risk of tire failure and improving traction on various terrains. Additionally, the increased number of wheels improves the vehicle's overall maneuverability and safety, especially when navigating tight turns or rough surfaces. This design choice also helps in extending the lifespan of tires and minimizing road wear.