What is the tire size of the K5?
2 Answers
The K5 has two tire sizes: 235/45R18 and 215/55R17. In 235/45R18, the first number 235 represents the tire width of 235MM, 45 indicates the aspect ratio of the tire cross-section is 45%, meaning the section height is 45% of the width, 18 stands for the rim diameter of 18 inches, and the middle letter "R" denotes a radial tire. In 215/55R17, the first number 215 represents the tire width of 215MM, 55 indicates the aspect ratio of the tire cross-section is 55%, meaning the section height is 55% of the width, 17 stands for the rim diameter of 17 inches, and the middle letter "R" denotes a radial tire. The K5 series uses Hankook OPTIMO-H426 as its tire brand and model. The spare tire is a non-full-size one. If you want to replace the tires yourself, you can follow these steps: Take out the spare tire and jack, place the jack under the vehicle frame of the tire to be replaced, ensuring the jack touches the metal part of the frame; Raise the jack until it supports the car, the jack should be under the vehicle, check and ensure the jack is at a right angle to the ground; Remove the hubcap, loosen the nuts counterclockwise, do not completely loosen them, just enough to eliminate resistance, when loosening the nuts for the first time, keeping the tire on the ground ensures that the nuts turn rather than the tire; Turn the nuts counterclockwise until they are loose, repeat this step for all lug nuts, completely remove the nuts; Place the new tire on the hub, carefully align the tire rim with the wheel bolts, install the lug nuts, tighten the nuts by hand until all nuts are concealed, at this point the tire replacement is complete. In addition to the model, the tire also has the following common data marked on it: Tire cord material: represented by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord tire. Speed rating: indicates the maximum speed at which the tire can carry the specified load under specified conditions. Letters A to Z represent the certified speed ratings of the tire 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 specification compatible with the tire. For practical use, such as "Standard rim 5.00F".
The original tire size for my K5 is usually 225/45 R18, as I found in the car manual. It drives quite smoothly, with the 225mm tire width providing stable grip, and the 45 aspect ratio ensuring moderate cushioning, complemented by the sporty look of the 18-inch wheels. Last time I changed tires, it cost me over 2000 yuan, and I opted for Hankook tires due to their high cost-performance ratio. However, it's important to note that mismatched sizes can increase fuel consumption or damage the suspension. Regular checks on tire pressure and tread depth are crucial to avoid skidding, especially in rainy conditions.
