Which type of trailer suspension design offers better stability on rough terrain?

The torsion axle suspension is designed to provide better stability on rough terrain due to its unique construction and functioning. This suspension system comprises a series of rubber cords housed within a metal tube, allowing the axle to twist independently to absorb bumps and shocks. This ability to flex and adapt to uneven surfaces helps maintain better tire contact with the ground, which is crucial for traction and stability.

Torsion axles typically result in a smoother ride, as they can handle the jolts caused by rough terrain more effectively than other suspension types. This adaptability not only enhances stability during travel over bumpy paths but also helps in minimizing load transfer between the axle and the trailer frame, leading to improved handling.

In contrast, while leaf spring suspension is durable and commonly used, it may not provide the same level of shock absorption. Solid axle suspension tends to transmit more road impacts to the trailer, and air suspension, though adaptable, can have limitations on how well it performs under heavy loads or extreme conditions compared to the torsion design.