Wheel width and tire matching
Release time:
2018-12-10 10:54
Source:
As we all know, wheels have many different diameters, ranging from 14 inches to more than 24 inches, but at the same time, the wheels also have different widths. The width of the wheels not only affects the installation of the wheels on the car, but also affects the tires on the wheels. The installation on the top, I will introduce it in detail for you below.
Hub size
The size of the hub is defined as "diameter x width", so a 17-inch hub may be 17x 7.0,17x 7.5 or 17x8.0.
The width of the hub usually increases in proportion to its diameter, so you can hardly see a 17x 5.0 or 17x 10 hub. The standard sizes are 14x 5.0 and 19x10.
The diameter of the wheel hub is easy to determine. Usually the third number of the tire size is, for example, 235/45/17 means that the tire is suitable for a 17-inch wheel hub, but the width of the wheel hub is not so easy to determine. Because most of the width values of the hub are engraved on the back of the spokes, the hub must be removed to read it. If the value is not engraved on the back, the actual measurement is required. Use a tape measure from the inside of each rim and the tire is in contact with the hub. The position is measured, not the outer edge of the hub.
Front and rear
Many high-end rear-drive vehicles, especially BMW and Mercedes-Benz, have wider rear wheels than the front wheels. This kind of wheel hub is called "front and rear". The "front and rear" rear wheels and their tires are wider, providing a larger ground contact area. This is a good thing, but there are also some details that need attention. First of all, "front and rear" means that the front and rear wheels cannot be interchanged, because the front wheels can be well adapted to the rear, while the rear wheels cannot be adapted to the front and will cause friction between the tires and the car body.
In addition, the tire sizes of the front and rear wheels are also different, which means that care must be taken when buying and installing tires to ensure that the tire size is correct and accurately installed on the adapted hub.
Tire matching
As with the wheel hub, the tire has a variety of different widths, and the determined tire width is approved to the corresponding wheel hub width, meaning that the tire has sufficient width to fit the wheel hub. However, in practice, there is often a situation of narrow tire width, that is, for a tire that is not wide enough, the tire wall is widened to make it fit, so the tire wall that should be perpendicular to the tread is inclined. This problem is easy to identify and extremely bad, because only when the tire wall is perpendicular to the tread can it effectively bear weight and protect the wheel hub in a collision.
To make matters worse, many people, especially teenagers, instead see this useless and dangerous condition as a trend, as if this extended appearance of the tire can somehow mask the silly fact that its tire wall is inclined at 45 degrees to the wheel hub.
I encounter this situation at least once a month:
"You know your tires are not wide enough, right?"
"It's an 'extended' look."
"Yes, it is this 'stretching' appearance that destroys your tires and makes your wheels look ugly."
You can show off your personality in your car, but unless it's for rock and roll, don't narrow the tires. Responsible tire installers will have a book that lists the approved tire widths that determine the wheel width, and they will never install tires that are not wide enough for the owner.
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