What does 24545r18 mean?
2 Answers
Tire 245/45r18 means: 245 indicates the tire width is 245 centimeters, 45 is the percentage of tire thickness to width which is 45%, 18 is the rim diameter in inches, and R stands for radial tire. Below is some tire maintenance knowledge: Tire maintenance: Regularly check tire pressure: The inflation pressure must follow the national standards specified for different types and specifications of tires. When the tire is flat or underinflated, inflate it to the proper pressure to minimize damage caused by low pressure. Avoid overloading: Excessive load can easily cause abnormal tire wear, severely reduce tire lifespan, and lead to safety accidents. Control vehicle speed: Try to keep the vehicle speed within the tire's maximum usage speed to reduce safety hazards. Rotate tires: Rotating tires minimizes uneven wear and maximizes the utility of each tire, extending their lifespan and helping to identify issues like misalignment. Follow proper inflation steps: Tire inflation should be done in two steps—first inflate with a small amount of air to ensure the tire is correctly mounted on the rim, then continue inflating to the standard pressure. Points to note when inflating tires: Ensure safety during inflation: Always use a pressure gauge to check the pressure to avoid overinflation, which can cause tire bursts. Inflate the tire only after it has cooled down, as driving heats up the tire and affects the pressure. Check the valve stem. Maintain cleanliness: The air being inflated should not contain moisture or oil to prevent deterioration and damage to the inner tube rubber.
Oh, I specifically researched these numbers when I last changed my tires. 24545r18 actually represents the tire specification, which is the size code of the tire. The slash in the middle is often omitted and written as 24545r18, but it should actually be 245/45R18. 245 refers to the tire width of 245 millimeters, simply put, how wide the tire is. 45 is the aspect ratio, meaning the height of the tire's sidewall is 45% of the width. The lower this ratio, the flatter the tire looks, providing better handling, but with a slight compromise in comfort. R stands for radial construction, which is the standard type for modern tires and is more durable. 18 indicates the wheel diameter of 18 inches, the size of that big metal disc-like rim. Choosing tires with this specification, if you drive a sedan or SUV, makes the car feel more stable and less prone to skidding during high-speed turns. However, remember to check the tire's load index and speed rating labels, which are usually marked on the side. Don't just focus on the size; safety is crucial.
