Traction, Tyres and Brakes
Tyres with tread depth below the legal minimum are…
Reviewed on 14 Jul 2026
- A Legal as long as there are no punctures
- ✓ Not legal (minimum 1.6 mm)
- C Only illegal on motorway
- D Allowed in winter
Why this is the correct answer
In Spain the minimum legal tread depth is 1.6 mm. Below that the tyre is no longer legal and aquaplaning risk increases sharply.
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