Why is it risky to assume a doubles or triples combination handles rain the same way a single-trailer rig does?

Pick an answer

1. Only the tractor's tires matter in wet conditions, not the trailers'
2. Rain has no different effect based on how many trailers are attached to the tractor since the tires and suspension are assumed to grip the same way regardless of load
3. The added trailers change weight distribution and increase the chance one unit hydroplanes or sways before the others do
4. Extra trailers make a combination immune to hydroplaning

Correct!

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