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Which dimension is the wheelbase?

  • A.The distance from the front axle to the foremost point of the vehicle, which determines the front overhang
  • B.The distance between the front and rear axle centres
  • C.The distance between the two wheels on the same axle, measured between the centres of the tyre contact patches
  • D.The overall length

Answer: B

Wheelbase is the longitudinal distance between the axle centres and is the single most important dimension governing interior space, ride quality and stability. Track is the corresponding transverse dimension. A long wheelbase gives a smoother ride and greater straight line stability while a short one improves manoeuvrability. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.

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