View Here : Tire Tread Wear Indicator
Newer tires have a convenience that older tires lacked. They have tread wear indicator bars built into the tires themselves. These bars, invisible or barely visible when the tires are new, gradually begin to appear as the tread wears down.
Some small tires (12-inch rim or smaller) only require a minimum of three tread wear indicators. Each tire wear indicator on a tire provides a visual indication of whether the tread is worn to 2/32″.
Another way to check tread depth is to look at the treadwear indicator bar that's molded into most tires. The bars are located at the bottom of the tread grooves in several locations around the tire. When these bars become visibly flush with the adjacent ribs the tire has no more than 2/32" of tread remaining.
Most tires have tread-wear indicators built into them (see Figure 2). These bars of hard rubber are normally invisible but appear across treads that have been worn down to 1/16th of an inch of the surface of the tire (the legal limit in most states).
…to have indicators molded into their tread design called "wear bars" which run across their tread pattern from their outside shoulder to inside shoulder.Wear bars are designed to visually connect the elements of the tire's tread pattern and warn drivers when their tires no longer meet minimum tread…
Tread Wear Indicator Bars Another indicator of worn out tread already lives in your tires themselves. Every performance, light truck, or medium commercial tire comes equipped with indicator bars (or wear bars) embedded between the tread ribs at 2/32”.
Tread Wear Indicator Bars . Your tires contain wear indicators built into the tread. Look for a bar molded into the bottom of the tread void, in the circumferential grooves.
Tread wear indicators - Cross ribs evenly spaced around the circumference of the tire in the main longitudinal tread grooves which become level with the tread surface when the remaining tread depth is down to approx. 1.6mm.
You can also check the tread wear indicator. You can find the tread wear indicator less than an inch (2/32 of an inch) from the bottom of the tread groove. When the tread wears down to become even with this level, the tire should be replaced.
Even if they appear to be in usable condition and have not worn down to the tread wear indicator. This applies to spare tires as well. 3- Proper care expands a tire’s lifespan