“18 inch alloy wheels” refers to a specific size and type of wheels commonly used in automobiles. Here’s what the term means:

 

Size: The number “18” indicates the diameter of the wheel in inches. In this case, the wheel is 18 inches in diameter. Wheel sizes can vary, and different sizes may be suitable for different vehicles or preferences.
Alloy Wheels: Alloy wheels are made from a combination of metals, usually aluminum or magnesium. They are known for being lighter and more stylish than traditional steel wheels. Alloy wheels can enhance the appearance of a vehicle and may also offer improved performance.