255/65R16 Tire Size
255/65R16 diameter, sidewall, revolutions per mile, and plus-sizing options.
The 255/65R16 tire size breaks down as: 255 mm section width, 65% aspect ratio, and a 16-inch rim. Below are its real, calculated dimensions.
255/65R16 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 29.1 in (738 mm) |
| Sidewall height | 6.5 in (166 mm) |
| Circumference | 91.3 in (2318 mm) |
| Revolutions per mile | 694 |
Typical Fitment
255/65R16 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 255/65R16, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 265/65R16 | 29.56 in | +1.8% |
| 265/60R17 | 29.52 in | +1.6% |
| 275/50R18 | 28.83 in | -0.8% |
Speedometer Note
If you fit a 265/65R16 instead of 255/65R16, the diameter changes by +1.8%. 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 255/65R16 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does 255/65R16 mean?
255/65R16 means a 255 mm wide tire with a 65% sidewall aspect ratio mounted on a 16-inch rim. The aspect ratio is the sidewall height as a percentage of the width.
Can I plus-size from 255/65R16?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from 255/65R16 are 265/65R16, 265/60R17, 275/50R18.
Will 255/65R16 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.