Tire depth gauge measure tire tread depth gauge for car truck bus tire depth ruler

1. Push the probe up to the end

2. Put the black flat seat on the tire tread surface

3. Push the size down again to see if the value is normal.
Red zone representative: to replace the tire;
Representative of the yellow area: It warns that it is about to be replaced;
Green zone representatives: normal use

Depth range: 1-25mm

Red area: 0-3mm&0-3/32

Yellow area: 3-5mm&4-32"-5/32"

Green area: 5-25mm&6/32"-1"