You can use a penny for that. Put in between the threads then mark and measure the depth on the penny.
I inspect the tire and measure the tread depth.
Minimum tread depth for all 4 tires is 2/32"
When the tread gets low.
A penny can be used to measure for safe tread depth on your car tires. Hold the penny upside-down in a tread groove. If the top of Lincoln's head is visible above the tread wall, the tires are completely worn out, and need to be replaced, pronto.
The standard tread depth for tires is 2/32 of an inch. It is important to maintain this depth because adequate tread depth helps tires grip the road, improving traction and handling. Insufficient tread depth can lead to reduced performance, increased risk of hydroplaning, and decreased braking ability, posing a safety hazard.
1.6 mm is the minimum
Slow down and make sure your tires have at least 2/32" of tread depth.
1mm according to UK law
When your tires have 2/32" tread depth left you need to replace them.
So they will grip when you lean the bike to turn.
In the United States, standard passenger vehicle tires are required to have a minimum tread depth of 2/32 of an inch. However, for optimal safety, many experts recommend replacing tires when the tread depth reaches 4/32 of an inch, especially in wet conditions. It's important to regularly check tire tread depth to ensure safe driving performance.
The minimum tread depth for semi-truck tires, as regulated by the Federal Motor Carrier Safety Administration (FMCSA), is 4/32 of an inch for steer tires and 2/32 of an inch for drive and trailer tires. However, many safety experts recommend replacing tires when tread depth reaches 5/32 of an inch to ensure optimal traction and safety, especially in wet conditions. Regularly checking and maintaining tire tread depth is crucial for safe operation.