195/55R15 Tire Size
195/55R15 diameter, sidewall, revolutions per mile, and plus-sizing options.
The 195/55R15 tire size breaks down as: 195 mm section width, 55% aspect ratio, and a 15-inch rim. Below are its real, calculated dimensions.
195/55R15 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 23.4 in (595 mm) |
| Sidewall height | 4.2 in (107 mm) |
| Circumference | 73.7 in (1871 mm) |
| Revolutions per mile | 860 |
Typical Fitment
195/55R15 is most often found on hot hatches. Always confirm against the door-jamb placard or owner manual before fitting.
Plus-Sizing Alternatives
These sizes keep the overall diameter close to 195/55R15, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 205/50R15 | 23.07 in | -1.6% |
| 205/45R16 | 23.26 in | -0.8% |
| 215/40R17 | 23.77 in | +1.4% |
Speedometer Note
If you fit a 205/50R15 instead of 195/55R15, the diameter changes by -1.6%. 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 195/55R15 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does 195/55R15 mean?
195/55R15 means a 195 mm wide tire with a 55% 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 195/55R15?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from 195/55R15 are 205/50R15, 205/45R16, 215/40R17.
Will 195/55R15 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.