265/65R18 tire size
A 265/65R18 tire is 265 mm wide with a sidewall 65% of its width (172.2 mm), fits a 18-inch rim and has an overall diameter of 802 mm (31.6 in).
| Dimension | Metric | Imperial |
|---|---|---|
| Section width | 265 mm | 10.43 in |
| Sidewall height | 172.2 mm | 6.78 in |
| Rim diameter | 457.2 mm | 18 in |
| Overall diameter | 801.7 mm | 31.56 in |
| Circumference | 2,518.6 mm | 99.16 in |
| Revolutions | 397 per km | 639 per mile |
Reading the size 265/65R18
265Width in mm65Aspect ratio (sidewall % of width)RRadial construction18Rim diameter in inches
The load index and speed rating (for example 91V) follow the size on the sidewall. Replacement tires should match or exceed the original load index and speed rating.
Alternative sizes within 3% of 265/65R18
A replacement size should stay within about 3% of the original diameter so the speedometer, ABS and transmission stay accurate. Always check clearance, load index and the vehicle manufacturer's approved sizes.
| Size | Diameter | Difference | Speedo reads 100 → actual | |
|---|---|---|---|---|
| 265/70R17 | 803 mm | +0.1% | 100.1 | Compare |
| 265/75R16 | 804 mm | +0.3% | 100.3 | Compare |
| 245/75R17 | 799 mm | -0.3% | 99.7 | Compare |
| 275/55R20 | 810 mm | +1.1% | 101.1 | Compare |
| 255/70R18 | 814 mm | +1.6% | 101.6 | Compare |
| 255/70R17 | 789 mm | -1.6% | 98.4 | Compare |
| 255/65R18 | 789 mm | -1.6% | 98.4 | Compare |
| 275/65R18 | 815 mm | +1.6% | 101.6 | Compare |
Compare 265/65R18 with any size →