245/65R17 Tire Size
245/65R17 diameter, sidewall, revolutions per mile, and plus-sizing options.
The 245/65R17 tire size breaks down as: 245 mm section width, 65% aspect ratio, and a 17-inch rim. Below are its real, calculated dimensions.
245/65R17 Calculated Dimensions
| Metric | Value |
|---|---|
| Overall diameter | 29.5 in (750 mm) |
| Sidewall height | 6.3 in (159 mm) |
| Circumference | 92.8 in (2357 mm) |
| Revolutions per mile | 683 |
Typical Fitment
245/65R17 is most often found on midsize SUVs and pickups. Always confirm against the door-jamb placard or owner manual before fitting.
Plus-Sizing Alternatives
These sizes keep the overall diameter close to 245/65R17, so speedometer and gearing stay near stock:
| Size | Diameter | Diameter change |
|---|---|---|
| 255/60R17 | 29.05 in | -1.7% |
| 255/55R18 | 29.04 in | -1.7% |
| 265/50R19 | 29.43 in | -0.4% |
Speedometer Note
If you fit a 255/60R17 instead of 245/65R17, the diameter changes by -1.7%. 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 245/65R17 against any other size and see the exact diameter and speedometer difference.
Frequently Asked Questions
What does 245/65R17 mean?
245/65R17 means a 245 mm wide tire with a 65% 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 245/65R17?
Yes, as long as the replacement keeps the overall diameter close to stock so the speedometer stays accurate. Common plus-size moves from 245/65R17 are 255/60R17, 255/55R18, 265/50R19.
Will 245/65R17 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.