Examkin

Question

Difficulty: MediumTyre Safety and Requirements

While carrying out a routine inspection of your vehicle, you notice excessive tread wear concentrated along only the inside edge of one front tyre, while the rest of the tread pattern is worn evenly and remains well within legal limits. What is the most likely cause of this specific wear pattern?

  1. Incorrect front wheel alignment (tracking)Answer
  2. B
    Driving with significantly under-inflated tyres
  3. C
    Driving with significantly over-inflated tyres
  4. D
    The tyre tread depth falling below the legal minimum of 1.6 mm across the central band

Answer

Incorrect front wheel alignment (tracking) is the most likely cause of uneven wear along a single edge of a tyre.
Incorrect wheel alignment (tracking) or suspension defects cause the wheels to run out of true alignment with the vehicle's direction of travel. This drags the tyre sideways as it rolls, creating heavy friction and rapid wear along just one edge.

Step-by-Step Solution

1
Analyze the observed tyre wear pattern from the inspection scenario.
The tyre exhibits isolated wear on one edge (the inner shoulder), while the rest of the tread shows normal, even depth.
Differentiating between symmetrical and asymmetrical wear patterns helps isolate mechanical faults from tyre pressure issues.
2
Identify the vehicle fault associated with single-edge tyre scrubbing.
Steering misalignment or improper tracking causes the wheel to point slightly inward or outward relative to the straight-ahead position, constantly dragging one edge across the road.
Uneven single-edge wear points directly to tracking or suspension misalignment rather than inflation pressure anomalies.

Key Concept

Tyre wear diagnostics and wheel alignment (tracking)
Estimated Time:1m 0s
Rate this question

Topics

Tyre Safety and Requirements

More questions from this topic