It’s easy to check your tire tread depth using a simple coin like a penny or a quarter.
Here’s how to do it
- Find a penny or quarter: These coins are readily available and can be used to gauge tire tread depth.
- Locate the tread grooves: These are the channels or patterns on the surface of your tire that help with grip and traction.
- Penny Test (2/32nds of an inch):
– Place a penny into a tread groove with Lincoln’s head facing downwards.
– If you can see the top of Lincoln’s head, the tire tread depth is at or below 2/32nds of an inch, which is considered worn and might be illegal in some places.
– If Lincoln’s head is partially or completely covered by the tread, your tires have more than 2/32nds of an inch of tread left, and you are good to go, according to Goodyear Auto Service.
- Quarter Test (4/32nds of an inch):
– Place a quarter into a tread groove with Washington’s head facing downwards.
– If you can see the top of Washington’s head, the tread depth is below 4/32nds of an inch, and you should consider replacing your tires soon, especially if you drive in areas with frequent rain or snow.
– If the tread covers the top of Washington’s head, your tires have at least 4/32nds of an inch of tread remaining, and you’re in good shape for now.
Important Notes
- Perform the test in multiple spots around each tire to account for uneven wear.
- Even if your tires pass the penny test, some experts recommend replacing them when they reach 4/32nds of an inch for optimal safety and performance, especially in wet conditions.
- Regularly check your tire pressure as well, as incorrect pressure can lead to uneven wear and affect tire performance.
- If you’re unsure about your tire tread depth or notice uneven wear, it’s always best to consult with a qualified mechanic or tire specialist.
This quick and easy coin method can help you stay aware of your tire’s condition and help ensure safe driving.
What is the best coin to measure tire tread?
Great question! The penny test is an accurate way to measure whether tire tread depth surpasses or falls short of 2/32nds of an inch, since 2/32nds of an inch is the universally standard distance between the top of Lincoln’s head and the edge of the coin (see above for an explanation of how to do the test).
Is the penny test accurate?
The penny test provides a reliable, quick estimate of tread depth, though it is not as precise as professional measurements. How often should I perform the penny test? It is recommended to check your tire tread using the penny test at least once a month and before long journeys.