What does 225/65r17 tire mean?

2 Answers
ValerieRose
07/28/25 7:24pm
Automobile tire 225/65R17 means the following: 1. 225: 225 represents the tire section width, the unit is mm, generally the width of the tire is between 145 and 285mm, with intervals of 10mm. 2. 65: 65 is the aspect ratio, which is the ratio of the tire sidewall height to the tire section width, 65 represents sixty-five percent, the aspect ratio of the tire is between thirty and eighty percent. 3. R: R indicates that the tire is of radial construction. 4. 17: 17 is the outer diameter of the wheel axle, the unit is inches. Additional information: Under normal circumstances, ordinary cars should not use tires with an aspect ratio greater than seventy-five percent, luxury cars and high-performance sports cars are recommended to use tires with an aspect ratio less than sixty percent.
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OZachary
08/12/25 12:27am
I've been driving for twenty years and often encounter tire replacement issues. The 225/65r17 specification is actually quite particular. The 225 refers to the tire width of 225 millimeters. Wider tires provide better grip on wet roads but also increase fuel consumption. The 65 represents the aspect ratio, meaning the tire sidewall height is 65% of the width. A smaller number offers better cornering stability but poorer shock absorption, while a larger number like 65 provides a more comfortable ride, especially on long trips. The R stands for radial construction, which is standard for most tires today, offering durability and wear resistance. The 17 indicates a rim diameter of 17 inches, and matching this size to the original vehicle specifications is crucial. Incorrect sizing can pose safety risks—I once saw a friend experience unstable steering and an accident due to wrong tire size. When replacing tires, it's best to check the manual and stick to the original specifications. I also regularly check tire pressure and wear since tires are critical for driving safety.
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