On motorcycles, what depth must the main grooves of the tire tread have?

Question

DentroTest · Accepted Answer

Unlike passenger cars, regulations do not require a legal minimum depth of 1.6 millimeters for motorcycle tires. However, it is highly recommended that the tread depth be greater than 3 millimeters to ensure safety. A worn tire loses grip and significantly increases the risk of aquaplaning in case of rain.

On motorcycles, what depth must the main grooves of the tire tread have?

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