What can you use to check if your vehicle's tires need replacing? your finger a penny a quarter a ruler

## Step 1<br />The question is asking for the best method to check if a vehicle's tires need replacing. The options provided are: your finger, a penny, a quarter, and a ruler.<br /><br />## Step 2<br />The most common and practical method to check tire tread depth is by using a penny. This method is based on the "penny test". <br /><br />## Step 3<br />In the "penny test", you insert a penny into the tire's tread groove with Lincoln's head upside down and facing you. If you can see the top of Lincoln's head, it means the tread depth is less than 2/32 of an inch, which is the minimum safe tread depth.<br /><br />## Step 4<br />Using your finger or a ruler is not a practical or accurate method for this purpose. A quarter is not used in this context.