Why You Need To Measure Tire Tread Depth A tire with only 3/32" or 4/32" of tread may be allowed on the road legally, but that doesn't mean it's ideal, especially in wet or winter conditions. The ...

All tires have a DOT or Tire Identification Number so that manufacturers can track defects and recalls. Find the 12-digit DOT number located on the sidewall and look at the last four digits.

The tire tread depth is the measurement between the groove (the gap between the patterned rubber) and the top of the tire tread. For new tires, this depth is usually 10/32 or 11/32 inches (8 or 9 mm).