Do heavier trucks take bumps better than lighter trucks?

Answer 1

A heavy duty truck that is empty will be very rough.

A light duty truck that is so fully loaded that the suspension 'bottoms out' will also be very rough'

A snub nosed truck with the cab and driver above the wheels will also be rough.

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But yes, the wheels will go up and down over the bump and the heavy mass including you will not move much.

Answer 2

Even though weight is a factor, the stiffness of the suspension system is the real contributor.