265/70R17 tire size in inches and millimeters
265/70R17 measures 31.61 inches in overall diameter, 10.43 inches in section width, with a 7.30 inch sidewall.
Every dimension
| Size | In inches | In millimetres |
|---|---|---|
| Overall diameter | 31.61 in | 802.8 mm |
| Section width | 10.43 in | 265 mm |
| Sidewall height | 7.30 in | 185.5 mm |
| Circumference | 99.29 in | 2,522.1 mm |
| Revolutions per mile | 638.1 per mile | 396.5 per km |
Sizes that fit the same wheel
These sizes share a 17 inch wheel diameter and sit within 3% of 265/70R17 in overall diameter, which is the range a swap stays inside without recalibrating anything.
The percentage difference in overall diameter is the speedometer error: a tire 2% taller makes an indicated 60 mph a true 61.2 mph. They are the same number, so it is shown once.
| Alternate size | Overall diameter | Difference (in) | Difference (%) | Width difference (in) |
|---|---|---|---|---|
| 285/65R17 | 31.59 | -0.02 | -0.06 | 0.79 |
| 335/55R17 | 31.51 | -0.10 | -0.31 | 2.76 |
| 245/75R17 | 31.47 | -0.14 | -0.44 | -0.79 |
| 235/80R17 | 31.80 | 0.20 | 0.62 | -1.18 |
| 305/60R17 | 31.41 | -0.20 | -0.62 | 1.57 |
| 215/85R17 | 31.39 | -0.22 | -0.69 | -1.97 |
| 315/60R17 | 31.88 | 0.28 | 0.87 | 1.97 |
| 345/55R17 | 31.94 | 0.33 | 1.06 | 3.15 |
| 225/80R17 | 31.17 | -0.43 | -1.37 | -1.57 |
| 225/85R17 | 32.06 | 0.45 | 1.43 | -1.57 |
| 255/75R17 | 32.06 | 0.45 | 1.43 | -0.39 |
| 295/65R17 | 32.10 | 0.49 | 1.56 | 1.18 |
| 275/65R17 | 31.07 | -0.53 | -1.68 | 0.39 |
| 325/55R17 | 31.07 | -0.53 | -1.68 | 2.36 |
| 255/70R17 | 31.06 | -0.55 | -1.74 | -0.39 |
| 275/70R17 | 32.16 | 0.55 | 1.74 | 0.39 |
| 355/50R17 | 30.98 | -0.63 | -1.99 | 3.54 |
| 295/60R17 | 30.94 | -0.67 | -2.12 | 1.18 |
| 235/75R17 | 30.88 | -0.73 | -2.30 | -1.18 |
| 325/60R17 | 32.35 | 0.75 | 2.37 | 2.36 |
| 355/55R17 | 32.37 | 0.77 | 2.43 | 3.54 |
| 245/80R17 | 32.43 | 0.83 | 2.62 | -0.79 |
| 205/85R17 | 30.72 | -0.89 | -2.80 | -2.36 |
How this is worked out
sidewall height in millimetres = section width × aspect ratio ÷ 100
overall diameter in inches = wheel diameter + (section width × aspect ratio × 2) ÷ 2540
section width in inches = section width in millimetres ÷ 25.4
circumference in inches = π × overall diameter
revolutions per mile = 63360 ÷ circumference in inches
The divisor is 2540, not the 2550 some converters publish. Two sidewalls in inches are 2 × width × aspect ÷ (100 × 25.4), and the rounding costs about 0.07 inches at 34 inches.
For 265/70R17: the sidewall is 185.5 millimetres, two of them are 14.61 inches, and adding the 17 inch wheel gives 31.61 inches overall.
Questions
What size is 265/70R17 in inches?
31.61 inches in overall diameter, 10.43 inches in section width, with a 7.30 inch sidewall.
How tall is a 265/70R17 tire?
31.61 inches, which is 802.8 millimetres.
What do the numbers in 265/70R17 mean?
265 is the section width in millimetres, 70 is the sidewall height as a percentage of that width, and 17 is the wheel diameter in inches. Overall diameter is the wheel diameter plus two sidewalls: 31.61 inches.
Does 265/70R17 fit a 17-inch wheel?
Yes — the 17 in a metric tire size *is* the wheel diameter, so 265/70R17 is made for a 17 inch wheel. Rim width is a separate question the sidewall code does not answer.
What tire sizes are equivalent to 265/70R17?
285/65R17, 335/55R17, 245/75R17 are the closest by overall diameter, all on the same 17 inch wheel.
Fitting a size is not only a matter of diameter. Rim width, load rating, speed rating and clearance all decide whether a size works on a given vehicle, and none of them can be read off the sidewall code alone.