When to Change Tires Tread: Use 4/32 for Rain Safety
Replace tires when tread reaches 2⁄32 inch (1.6 mm), wear bars become flush, or the tire has a bulge, exposed cords, deep crack, or unsafe puncture. Plan replacement earlier, around 4⁄32 inch in wet climates and 6⁄32 inch for demanding snow use, because legal minimum tread is not the same as strong wet or winter […]