Correct answer
It supports proper tyre operation and wear.
It supports proper operation and avoids wear and fuel-use penalties associated with incorrect pressure. Low pressure may increase deformation, heat and rolling resistance; excessive pressure can also cause abnormal wear. Correct pressure alone does not guarantee grip, service life or freedom from aquaplaning: tread, load, speed and road water also matter.
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It supports proper tyre operation and wear.
It necessarily makes the tyres less safe.
It forces higher engine fuel use by increasing rolling resistance.
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