Which tool is used to check tire pressure?

A tire gauge is the correct tool used to check tire pressure. It is specifically designed to measure the amount of air pressure inside a tire, which is essential for maintaining safe driving conditions. Proper tire pressure ensures optimal tire performance, fuel efficiency, and safety. Under-inflated or over-inflated tires can lead to reduced traction, increased tire wear, and a greater risk of tire blowouts.

The speedometer measures the speed at which a vehicle is traveling; it does not provide any information about tire pressure. A wrench is typically used for gripping, turning, or loosening nuts and bolts, not for checking air pressure. RPM, which stands for revolutions per minute, is a measure of how many times the engine's crankshaft makes a complete rotation in one minute and is unrelated to tire pressure. Thus, using a tire gauge is essential for maintaining proper tire health and overall vehicle safety.