Easy Ways to Measure Tire Tread Depth
A tire’s tread is crucial for driving safely and ensuring good performance. When the tires are used over time, they become less effective at gripping the road, since the tread depth becomes shallower with wear. Tread depth is measured from the top of the tire’s rubber to the bottom of the tire’s deepest grooves. In general, new tires start with a tread depth of 10/32″ – 12/32″. They must be replaced when the tread depth is 2/32″. But can you measure it yourself? There are 4 simple ways to do it.
- Penny Test
This method only requires a US penny coin. Place the penny with Lincoln’s head upside down into the shallowest groove on the tire. If all of Lincoln’s head is visible above the tread, you only have 2/32″ or less tread depth remaining and it’s time to replace your tires.
- Quarter Test
For those who want an earlier warning for tire replacement, use a quarter to test the depth instead. Place the quarter with Washington’s head upside down into the shallowest groove. If all of Washington’s head is visible above the tread, you have 4/32″ or less tread depth left.
- Gauge Test
A gauge test is the most accurate way to know a tread depth and can be found online or at your local store. All gauges should measure in the 1/32″. To measure, place the gauge inside any tire tread and push down, then remove the gauge carefully. You will get an accurate measurement of the tread depth.
- Indicator Bar Test
Another method is to use an indicator bar, which is a built-in measurement of tire tread. The bars are located in random positions inside the tread grooves of your tire. When these bars line up with the adjacent ribs in the tire, there is 2/32″ of tread or less remaining. In this case, the tires are completely worn out and should be replaced.
As mentioned previously, proper tire treads provide security by helping avoid accidents caused by ineffective road-gripping. With these simple tricks, you can quickly and easily measure tire tread depth at home. If you are still not sure, please visit us at OTSURA.COM, or call any of our specialists at +1-855-687-8721. We are a specialized tire wholesaler across the USA, and can provide quality tires to maximize the performance of your tractor!