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Which wear pattern indicates excessive toe in?

  • A.Wear on both shoulders with the centre unworn, which indicates that the tyre has been running underinflated
  • B.Feathering with the sharp edges towards the outside
  • C.Wear on the inner shoulder only, which follows from the wheel leaning inward at the top during normal running
  • D.Even wear

Answer: B

Toe in scrubs the tread outward, so the tread blocks develop a sharp edge on the outer side and a rounded edge on the inner. Toe out reverses the pattern. Feeling across the tread with the palm identifies the direction immediately. 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.

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