Manitoba Knowledge Test Coach
Safe drivingQuestion 274 of 310

What does over-inflation do to a tire?

  1. The edges of the tire wear out first
  2. The centre of the tire wears out first
  3. The tire wears evenly across the tread
  4. The tire gets better grip on wet roads
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Correct answer: The centre of the tire wears out first

Too much air makes the tire bulge, so the centre touches the road more and wears first.

Source: Driver's Handbook (Manitoba Public Insurance, February 2026), Tires, page 92

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Questions last reviewed: 18 October 2026