Minimum tread depth for all 4 tires is 2/32"
in Manitoba we fail them at 3/32"
In the United States, the tread has to be 4/32 (3.17mm) or more on the front tires and 2/32 (1.58mm) or more on the back tires. rear tires can be retreaded but not the front "steer" tires.
On or before your country's legal minimum requirement for tread. If in doubt see out a qualified fitter to check the tread depth for you
The minimum tyre tread depth in the UK is 1.6mm.
2/32 of an inch in most parts of the USA. Local laws may vary.
In most parts of the USA it is 2/32 of an inch.
Turn a United States penny upside in the tread. If you can see all of President Lincoln's head, your tire is bald.
In Oregon there is no minimum thread depth, but just that Oregon requires that tires be in safe operating condition, without any bulges or exposed cords.
The minimum tread depth in New York is 2/32". U.S.- and European-manufactured tires have wear bars or tread wear indicators molded into the tread. There are portions of the tire that are raised 2/32". When the tread wears down so the tires are no longer legal, these portions will form a smooth bar across the tire in several places.
All tires on vehicles driven in Missouri must be safe. There is no listed minimum tiretread depth or mention of tire grooving in the laws.
If you mean tire tread depth, the minimum is 1.6mm.