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The geometry that makes the inner wheel turn through a larger angle than the outer during a turn is known as _____.

  • A.bump steer, which is instead the unwanted change of toe that occurs as the suspension moves through its travel
  • B.castor trail
  • C.the thrust angle, which describes the direction in which the rear axle points relative to the vehicle centre line
  • D.Ackermann geometry

Answer: D

Inclining the steering arms so that their extensions meet at the rear axle gives the inner wheel the larger angle it needs to follow the tighter radius. Without it both front tyres scrub in every turn. Naming what changes and what stays the same is the reliable route through questions of this shape. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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