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What is the tire model specification for the BMW X4?

2 Answers

JaxonMarie

07/24/25 3:44am

The tire model for the BMW X4 is 245/45R20. The first number, 245, represents the tire width of 245MM. The 45 indicates the tire's aspect ratio is 45%, meaning the section height is 45% of the width. The letter R stands for radial tire, and 20 denotes the rim diameter of 20 inches. The BMW X4 has a top speed of 260km/h, accelerates from 0 to 100km/h in 6.35 seconds, and has a fuel consumption of 8.6L per 100km. In addition to the model, the tire also carries the following common data: Tire cord material: Indicated by Chinese pinyin, such as M for cotton cord, R for rayon cord, N for nylon cord, G for steel cord, and ZG for steel radial cord tire. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under specified conditions. Letters from A to Z represent certified speed ratings from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h. Rim specification: Indicates the rim size compatible with the tire for practical use, such as "Standard Rim 5.00F".

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LaCarmen

08/10/25 11:21pm

As a BMW X4 owner for several years, I must say tire specifications are crucial. The standard configuration is usually 245/45 R20, meaning a width of 245mm, aspect ratio of 45%, mounted on 20-inch wheels, but this may vary by year or trim level. For example, the base model might use 245/50 R18, while the top-tier M version could come with 255/40 R21. Choosing the correct size is vital as it affects steering stability, braking efficiency, and fuel consumption. Arbitrarily changing tire width or wheel size may increase suspension load or cause safety system errors. I always check the label on the driver's side door frame or refer to the owner's manual to confirm the exact model. Run-flat tires are common in BMWs, but selecting a matching specification from reputable brands can enhance comfort. Remember, tires are the only contact point between your car and the road, so regularly checking tire pressure and tread depth helps prevent accidents and ensures safe daily commutes.

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