Correct answer
Make sure the tyre tread depth is never less than 1.6 mm.
Keep tyres in good condition with at least 1.6 mm in the principal tread grooves, the regulatory minimum for this category. Tread helps disperse water, but meeting the minimum does not guarantee good grip in all conditions. Recommended pressure, damage, speed and road condition also matter. Do not arbitrarily increase pressure or mix tyre constructions contrary to vehicle approval and specifications. This case excludes the limited Annex VII.2 exception for certain historic vehicles.
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Inflate the tyres more.
Use radial tyres on the front wheels and cross-ply (diagonal) tyres on the rear wheels.
Make sure the tyre tread depth is never less than 1.6 mm.
The real exam in English is a translation of the Spanish original; compare both here.
Show the Spanish original
Excluyendo la excepción reglamentaria de ciertos vehículos históricos, en un turismo de categoría M1, ¿cuál de estas medidas ayuda a conservar la adherencia, especialmente sobre una calzada mojada?
- Cuidar que la profundidad del dibujo del neumático nunca sea inferior a 1,6 mm.(Correct answer)
- Inflar más los neumáticos.
- Utilizar neumáticos radiales en las ruedas delanteras y diagonales en las traseras.
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