1/32 inch
Minimum tread depth for all 4 tires is 2/32"
It's 1.6 millimetres
2/32 of an inch
To my knowledge all US states require a minimum 2/32nds tread or more to be legal to roll down the road. This measurement is taken in the shallowest portion of tread on unevenly worn tires as well. Hope this helps.
It varies from state to state. In most states it is 2/32" but in some it is 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.
It depends on the legislation of the country in question
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
Turn a United States penny upside in the tread. If you can see all of President Lincoln's head, your tire is bald.
More than narrow tread tires.
4/32 on steer axle.2/32 on all others
2/32 of an inch in most parts of the USA. Local laws may vary.