When turning suddenly while pulling doubles, which trailer is most likely to turn over?

When turning suddenly while pulling doubles, the rear trailer is most likely to turn over due to its geometry and dynamics during a sharp turn. The rear trailer has a greater angle of articulation compared to the lead trailer, making it more susceptible to tipping over if the turn is sharp enough.

In a sudden turn, the lead trailer maintains a more stable position since it is closer to the pivot point created by the tractor, allowing it to navigate the turn with less risk. The rear trailer, however, has to navigate the turn around the lead trailer and can experience an increased lateral force that may push it to its tipping point, especially if the weight distribution is not managed appropriately.

Therefore, when considering the mechanics of turning with a double trailer setup, the rear trailer stands out as the one more likely to experience instability and a potential rollover under sudden turning conditions.