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Which consequence follows from a very high roll centre?

  • A.Excessive body roll, which follows from the increased distance between the roll centre and the centre of gravity
  • B.A soft ride
  • C.A reduction in the lateral load transfer, which improves the grip available at the outer tyre during cornering
  • D.Jacking of the body in a corner

Answer: D

A high roll centre gives a large geometric load transfer component that pushes the body upward, which is the swing axle problem. It does reduce roll, so the second option inverts the relationship. Designers keep it low and controlled. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. The order in which the effects act is what decides the outcome, so it is worth establishing first. Checking the units of each quantity catches a wrong formula before the arithmetic begins.

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