What does the car tire code 205/55r1691v mean?
3 Answers
The car tire code 205/55r1691v indicates that the tire has a section width of 205mm. The number 55 represents the aspect ratio, which is the percentage of the tire's section height divided by its width. The letter 'r' stands for radial construction, indicating it's a radial tire. The number 16 denotes the rim diameter in inches. The number 91 is the load index, corresponding to a maximum load capacity of 615kg. The letter 'v' is the speed symbol, meaning this tire has a maximum speed capability of 240 kilometers per hour. Tires are circular elastic rubber products mounted on metal rims that support the vehicle body, absorb external shocks, maintain contact with the road surface, and ensure driving performance.
When you see the string of characters 205/55R16 91V on a tire, let me explain their meanings. 205 refers to the tire section width of 205 millimeters, which is the width of the part of the tire that contacts the ground. 55 is the aspect ratio, representing the percentage of the tire's sidewall height relative to its width—55% means the sidewall height is approximately 112.75 millimeters. R stands for radial construction, which is the type used by most vehicles today. 16 indicates the rim diameter of 16 inches, which must match your wheel. 91 is the load index, meaning each tire can bear a maximum load of 615 kilograms. V is the speed rating, indicating the tire can handle a maximum speed of 240 km/h. These parameters are crucial—you must choose the right ones when replacing tires, as incorrect choices can affect driving safety. Also, always check tire wear during regular driving, as tires are key components directly in contact with the road.
These tire specifications directly impact your daily driving experience. The 205mm tread width provides decent grip, offering more stability during high-speed cornering, though it comes with slightly higher fuel consumption compared to narrower tires. The 55 aspect ratio is moderate, delivering acceptable comfort on urban paved roads, but you'll feel more vibration when hitting large potholes compared to thicker tires. The V speed rating ensures sufficient safety margin for highway driving, especially capable of enduring prolonged high-load operation during long-distance trips. The 91 load index is more than adequate for regular family cars, handling passengers and luggage with ease. When replacing tires, prioritize OEM specifications to avoid odometer inaccuracies or interference with ABS system operation. Regular tire pressure checks are also crucial for extending service life.
