205/65R15 Tire Size
205/65R15 diameter, sidewall, revolutions per mile, and plus-sizing options.
The 205/65R15 tire size breaks down as: 205 mm section width, 65% aspect ratio, and a 15-inch rim. Below are its real, calculated dimensions.
205/65R15 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 25.5 in (648 mm) |
| Sidewall height | 5.2 in (133 mm) |
| Circumference | 80.1 in (2034 mm) |
| Revolutions per mile | 791 |
Typical Fitment
205/65R15 is most often found on midsize sedans and wagons. Always confirm against the door-jamb placard or owner manual before fitting.
Plus-Sizing Alternatives
These sizes keep the overall diameter close to 205/65R15, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 215/60R15 | 25.16 in | -1.3% |
| 215/55R16 | 25.31 in | -0.7% |
| 225/50R17 | 25.86 in | +1.4% |
Speedometer Note
If you fit a 215/60R15 instead of 205/65R15, the diameter changes by -1.3%. A taller tire makes your speedometer read low — at a true 60 mph it would show roughly 61 mph. A shorter tire has the opposite effect, so the gauge reads high.
Use the tire calculator to compare 205/65R15 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does 205/65R15 mean?
205/65R15 means a 205 mm wide tire with a 65% sidewall aspect ratio mounted on a 15-inch rim. The aspect ratio is the sidewall height as a percentage of the width.
Can I plus-size from 205/65R15?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from 205/65R15 are 215/60R15, 215/55R16, 225/50R17.
Will 205/65R15 affect my speedometer?
Only if it differs in diameter from your original size. A taller tire reads low; a shorter tire reads high. Compare the two sizes with the calculator to find the percentage.