255/60R17 Tire Size
255/60R17 diameter, sidewall, revolutions per mile, and plus-sizing options.
The 255/60R17 tire size breaks down as: 255 mm section width, 60% aspect ratio, and a 17-inch rim. Below are its real, calculated dimensions.
255/60R17 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 29.0 in (738 mm) |
| Sidewall height | 6.0 in (153 mm) |
| Circumference | 91.3 in (2318 mm) |
| Revolutions per mile | 694 |
Typical Fitment
255/60R17 is most often found on SUVs and light trucks. Always confirm against the door-jamb placard or owner manual before fitting.
Plus-Sizing Alternatives
These sizes keep the overall diameter close to 255/60R17, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 265/60R17 | 29.52 in | +1.6% |
| 265/55R18 | 29.48 in | +1.5% |
| 275/45R19 | 28.74 in | -1.0% |
Speedometer Note
If you fit a 265/60R17 instead of 255/60R17, the diameter changes by +1.6%. A taller tire makes your speedometer read low — at a true 60 mph it would show roughly 59 mph. A shorter tire has the opposite effect, so the gauge reads high.
Use the tire calculator to compare 255/60R17 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does 255/60R17 mean?
255/60R17 means a 255 mm wide tire with a 60% sidewall aspect ratio mounted on a 17-inch rim. The aspect ratio is the sidewall height as a percentage of the width.
Can I plus-size from 255/60R17?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from 255/60R17 are 265/60R17, 265/55R18, 275/45R19.
Will 255/60R17 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.