When is it mandatory to replace a passenger car's tires based on tread depth?

Question

DentroTest · Accepted Answer

The General Vehicle Regulations state that passenger car tires must have a minimum tread depth in the main grooves of 1.6 millimeters. Driving with a depth less than this figure is illegal, drastically reduces grip, and increases the risk of aquaplaning. The other options (2 mm or 3 mm) may be safety recommendations from manufacturers, but the mandatory legal limit is 1.6 mm.

When is it mandatory to replace a passenger car's tires based on tread depth?

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