At a carpool spot near Naarden you feel a slight vibration in the steering and notice the left front tyre is worn at an angle. What is the most likely defect here?
A nitrogen tyre losing pressure, recognisable by the green valve cap
Suspension — tracking is disturbed, for example after hitting a kerb
Just low tyre pressure, nothing else going on
Explanation
Wrong — trap: uneven wear = always pressure. Steering vibration + uneven wear is attributed by the book to the suspension (tracking), not primarily to pressure (Book p.224).