You can check your tire tread depth using which coin?

The correct answer is a quarter. Using a quarter to check tire tread depth is a common method because the design of the quarter can provide a clear indication of whether your tires have sufficient tread. When you insert a quarter into the tire tread with George Washington's head down, if the tread covers part of Washington's head, the tread is considered deep enough for safe driving. This means there's adequate grip and traction for your tires on the road.

The quarter is about 0.25 inches thick, which is a good standard for measuring tire wear. In contrast, the other coins do not provide the same reliable measurement for tread depth due to their smaller sizes. For instance, a penny and a dime measure only 0.75 inches and 0.1 inches respectively, making them less effective for this particular purpose. Using these smaller coins can lead to an inaccurate assessment of tread safety. Therefore, the quarter offers a straightforward and effective way to ensure that your tires remain roadworthy.