3/8 inch.
The Commercial Tire Company offers a wide variety of tires. Commercial Tire Company also offers tire replacement and tire patching jobs for different types of vehicles.
In most parts of the USA it is 2/32 of an inch.
In most of the USA, the legal minimum is 2/32 inch.
In most states if the tire is worn to 2/32 it is consider an unsafe tire and should be replaced. Some states it is 3/32.
It is an indicator of tire tread wear.
One of the dangers of a retreaded tire is that the tread can pop off, bounce all over the road, hit other vehicles, and cause damage.
Illinois, along with 41 other states require 2/32" tread 2 States require 1/32" 6 States have no tread depth requirements
If you mean tire tread depth, the minimum is 1.6mm.
Minimum LEGAL tire tread depth is 2/32nds of an inch.
Tire spec in PA is 2/32 of an inch of minimum tread
1 mm on whole tire. If any part of tread is less then it should be replaced.
The tread is what grips the road.