What is the difference between 18-inch and 19-inch tires?

[SanDeclan]

The most obvious difference between 18-inch and 19-inch wheels is their size. The 18/19-inch refers to the diameter of the wheel rim, with the 18-inch wheel being smaller than the 19-inch one. Below is additional information: 1. Introduction: The wheel hub is the central part of the wheel, mounted on the axle to support the tire. It is cylindrical in shape and usually fitted with bearings to reduce friction. The most common types of wheel hubs are steel rims and aluminum alloy rims. 2. Steel wheels: The main advantages of steel wheels are their simple manufacturing process, relatively low cost, and strong resistance to metal fatigue, commonly known as being cheap and durable. 3. Aluminum alloy wheels: Aluminum alloy wheels are lighter in weight, have lower inertial resistance, and higher manufacturing precision. They deform less during high-speed rotation, which helps improve the car's straight-line driving performance, reduces tire rolling resistance, and thereby decreases fuel consumption.