What does 235/55r18 mean?
2 Answers
235 represents the tire's cross-sectional width of 235mm; 55 represents the tire's aspect ratio, with a higher value indicating a thicker tire; r stands for radial tire type, and 18 indicates the rim diameter of 18 inches. Below is relevant information about tires: Wear: Tires have wear indicators. There are triangular marks on the side of the tire, and when the tread wears down to the point indicated by the triangle, it is recommended to replace the tire. Inside the tire's tread grooves, there are also raised markers. When the tread wears down to the level of these raised markers, the tire should be replaced. Simple punctures can be repaired without needing replacement, but bulges must be replaced. Aging: Rubber oxidizes in the air, and oxidized rubber hardens, reducing grip. Therefore, even if a set of tires is not used, their lifespan will decrease. It is not recommended to use tires for more than 5 years from the production date. The production date is marked on the side of the tire.
Oh, this is a pretty common question! The numbers 235/55R18 are like the tire's ID code. Simply put, 235 means the tire width is 235 millimeters – wider tires give better stability but may increase fuel consumption a bit. The 55 is the aspect ratio, meaning the tire's height is 55% of its width; a lower percentage means a thinner tire with quicker cornering response but a bumpier ride over speed bumps. R stands for Radial construction, which is the standard type used nowadays. The 18 is the rim diameter in inches – bigger rims look cooler, but when changing tires, make sure they match the original specs. Don't sacrifice safety for looks! I've seen friends who casually changed tires end up with uneven wear issues, so choosing tires should be based on the vehicle model, not just size. Also, consider load and speed ratings for worry-free and safe daily driving.
