What does the 175/65r14 tire mean?
3 Answers
Tire specification 175/65r14 represents tire specification parameters. Among them, 175 represents a section width of 175 millimeters, which is the width of the tire tread; 65 represents an aspect ratio of 65%; R represents that the tire type is a radial tire; 14 represents the rim diameter, meaning this tire is suitable for 14-inch rims. Below are specific introductions about car tires: 1. Car tires can be divided into pneumatic tires and solid tires according to different carcass structures, with the vast majority of modern cars using pneumatic tires; 2. According to the level of internal air pressure, pneumatic tires can be divided into high-pressure tires, low-pressure tires, and ultra-low-pressure tires, with low-pressure tires commonly used in various types of vehicles; 3. Pneumatic tires can be divided into tube tires and tubeless tires according to different structural compositions, with tubeless tires commonly used in passenger cars; 4. According to different arrangements of internal cord layers and buffer layers, tires can also be divided into radial tires and bias tires, with radial tires commonly used in vehicles; 5. The sidewalls of tires are all marked.
The sequence 175/65R14 is like the ID card of a tire, and breaking it down reveals its secrets. The 175 indicates that the tire's maximum width is 175 millimeters—the wider this number, the more robust the tire looks, and the better its grip. The number 65 is interesting; it represents the aspect ratio, meaning the tire's sidewall height is 65% of its width, which calculates to approximately 113.75 millimeters. The letter R stands for radial, the most common type of tire today, where the internal layers are arranged like bicycle spokes, providing stability and comfort while driving. Finally, the 14 means this tire must be mounted on a 14-inch wheel. My own car uses this size—narrow tires are more fuel-efficient and agile in corners, but they can't match the high-speed stability of wider tires.
To understand the numbers on a tire, let's take 175/65R14 as an example. The first three digits, 175, represent the tread width in millimeters. The number 65 is a ratio that depends on the width, calculating the tire's thickness as a percentage of the width. I've seen people use this ratio to calculate the actual thickness of the tire, only to find that tires with thicker sidewalls indeed provide a smoother ride over speed bumps. Nowadays, R is basically synonymous with radial tires. Pay attention to the 14-inch rim size—even a half-inch difference can make the tire impossible to install when changing tires. This specification is commonly found in small cars like the Fit and POLO, with fuel efficiency being an advantage, while wet road grip is considered a drawback.
