What is the difference in tire specifications and sizes?
2 Answers
The differences in tire sizes are: 1. Distance variation: Larger tires cover more ground per revolution of the connected driveshaft, while smaller tires cover less distance per revolution. 2. Traction difference: Larger tires have greater contact area with the road surface, enhancing vehicle traction; smaller tires have reduced contact area, resulting in weaker grip. Automobile tires can be categorized by carcass structure into pneumatic tires and solid tires, with most modern vehicles using pneumatic tires. Based on internal air pressure, pneumatic tires are classified into high-pressure, low-pressure, and ultra-low-pressure types, with low-pressure tires being the most commonly used across vehicle categories.
As an ordinary person who drives frequently, I find that the differences in tire specifications and sizes have quite a significant impact. Smaller-sized tires, such as 15-inch rims with thicker sidewalls and an aspect ratio around 60, provide better shock absorption and significantly reduce road bumps, making them more comfortable for family outings with kids. Narrower tires, like 185mm in width, are more fuel-efficient compared to 220mm-wide tires, saving a bit on fuel costs each month. However, switching to wider tires, while improving high-speed stability, increases fuel consumption, makes the steering heavier, and complicates parking and turning. I've also noticed that choosing thicker sidewalls in winter can improve traction on icy surfaces, enhancing safety. Choosing the wrong specifications can lead to handling imbalances and even accelerate tire wear, which isn't worth the trade-off. The manufacturer-recommended size is usually the most balanced—don’t modify it casually to avoid compromising safety and your wallet.
