![]() ![]() ![]() However, with a Washington quarter showing his head, it will show 4/32” remaining which is a more realistic tread depth, especially in rainy conditions.Ī better method of measuring stopping distances is to actually measure rainy tire distances. With a 2/32” of remaining tread on a Lincoln penny, the typical tire is already close to bald in rainy or snow conditions. Rather than using a Lincoln penny, a Washington quarter is more realistic, so say some tire aficionados. The final 2/32" of a tire's tread depth isn't included in the tire’s tread calculation because the tire is considered already legally worn out with 2/32" of remaining tread depth. ![]() So, on a tire that starts with a new 10/32” depth and has worn off 4/32” is now 50% worn. However, remember that the useable tread depth is measured by subtracting 2/32” from the tire’s new tread depth. The typical new tire used on automobiles is measured with 10/32” to 11/32” of tread depth. With winter/snow and light truck tires the tread is deeper because this depends on the tire’s tread type, which is either the Highway Rib, Highway All-Season, Off-Road All-Terrain or Off-Road Maximum Traction. If Lincoln’s entire head is visible, that means that 2/32” of tread is still available, and that means that the tire is legally worn out, in most states. The best and most accurate way to measure tread depth is with a Tire Tread Depth Gauge. If that is not readily available, a quick and easy trick is to use a Lincoln penny. In the United States, this is always measured at 32nd of an inch with no exceptions! What tire depth means is simply the distance between the top of the tread to the bottom of the deepest tread groves. We often hear about tire depth and how thick it should be before you need to replace your tires. ![]()
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