# What coin do you use to check tire depth?

## What coin do you use to check tire depth?

For years, motorists have been told the “penny test” is an accurate indicator of whether or not you need new tires. The test is conducted by sticking a penny head down in a tire tread; if you see all of Lincoln’s head, then you should change the tires.

## How do you use a tread depth indicator?

Some tread depth gauges measure in 32nds of an inch (left), while others measure in both 32nds of an inch and millimeters (right). Step 2: Push the tread depth gauge against a hard, flat surface to confirm it “zeros out” when fully compressed. Step 3: Push the measuring scale into the gauge as far as it will go.

What is minimum tread depth for steer?

4/32 of an inch
According to Federal Motor Carrier Safety Administration (FMCSA) regulations, the minimum tread depth for a steer tire is 4/32 of an inch on every major tread groove.

How do I check my tread depth UK?

Just take a 20p coin and insert it into the tread grooves on the tyre. If you can’t see the outer band on the coin, your tyres are above the legal limit. However, if you can see the band and that section of the coin is still visible, your tyres could be unsafe and require professional inspection by a mechanic.

### How do you gauge tire tread with a penny?

Tire tread is composed of several ribs. Turn the penny so that Lincoln’s head points down into the tread. See if the top of his head disappears between the ribs. If it does, your tread is still above 2/32” , If you can see his entire head, it may be time to replace the tire because your tread is no longer deep enough.

### How do you check TYRE tread depth without a gauge?

Place a 20p coin into the main tread grooves of your tyre. If the outer border is hidden when it is inserted then your tread is above the legal limit. If you can see the outer border of the coin, then the tyre is either approaching the legal minimum tread depth or has already reached it and requires replacement.

How do you measure 1.6 mm?

All you need is a 20p coin. Take the coin and insert it into the tread grooves on your tyre. If, when you have inserted the coin, you cannot see the outer band of the coin, this indicates that your tyre is above the legal limit of 1.6mm.

Where does dot measure tread depth?

Tread depth refers to a vertical measurement from the top of tire rubber to the bottom of the tire’s groove. The depth in the United States is measured in 1/32 of an inch.

#### How can I tell if my tires need to be replaced?

Place a penny head first into several tread grooves across the tire. If you always see the top of Lincoln’s head, your treads are shallow and worn. If this is the case, your tires need to be replaced. If part of Lincoln’s head is always covered by the tread, you have more than 2/32 of an inch of tread depth remaining.

#### How do I know if my tires are still good?

Insert the penny upside down (with Lincoln’s head pointing into the tire) in between the tire tread. How’s Lincoln’s hair? Can you see the top of Lincoln’s head? This means your tire tread has worn down to an unsafe level and it’s likely time to buy new tires.

How do you measure tire tread with a ruler?

Using a ruler or a tire tread gauge will give you the most accurate results, and using them is straightforward: simply place one end of the ruler in the tread and read off the height on the ruler.

What is a penny test?

But the easiest way is to do a penny test. Take a penny and place it with Lincoln’s head upside down between two ribs on your tire. If part of the head is covered, your tires are still in good shape. If you can see his entire head, your tread is worn to 2⁄32 inch or less and it’s time for new tires.

## What does 1.6 mm tread look like?

The border around the outside edge of a 20 pence piece is approximately 1.6mm. Place a 20p coin into the main tread grooves of your tyre. If the outer border is hidden when it is inserted then your tread is above the legal limit.