Practice question

Why do trailer wheels track inside the path of the tractor wheels during a turn?

Because the trailer suspension has softer leaf springs than the tractor
Because the trailer wheels are not steering and must pivot behind the kingpin connection
Because the trailer air brakes apply slightly faster than the tractor brakes
Because of the aerodynamic drag acting on the side of the trailer

Answer: B — Because the trailer wheels are not steering and must pivot behind the kingpin connection

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