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Minimum tread depth for all 4 tires is 2/32"
in Illinois it is 4/32 front tires and 2/32 all tires
The minimum distance is the depth of the excavation...
It's not allowed. It is a violation of vehicle safety regulations. If you'd get caught out in rain they'd hydroplane real easily, that's why the law require a certain minimum tread depth.
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.
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.
2/32 of an inch in most parts of the USA. Local laws may vary.
4/32 on steer axle.2/32 on all others
In most parts of the USA it is 2/32 of an inch.
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.
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
In Virginia you must have 2/32 tread depth on all 4 tires to pass inspection.