Minimal tire groove is key to running safely

The tire must always have a minimum groove of 1.6 millimeters. I don’t know if you’ve noticed, but even in Formula 1, it often starts to rain and people rush to change the smooth tires in the pit for others with grooves, which avoid water between the tire and the asphalt.

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• It’s past time for you to know what the TWI of the tire is

Your car’s tires should also have a minimum groove of 1.6 millimeters. And this minimum groove is defined by some rubber bricks that are at the bottom of the groove, when the tire wears out until it reaches it.

This rubber brick is a sign that it has already arrived at the very least. This rubber band is the TWI, initials in English for Groove Wear Indicator.