Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/70-18 | 255/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.95 (786.2) | 31.05 (788.7) | 0.1 (2.5) 0.3% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 97.24 (2469.92) | 97.55 (2477.77) | 0.31 (7.85) 0.3% |
| Sidewall Height inches (mm) | 6.48 (164.5) | 6.53 (165.75) | 0.05 (1.25) 0.8% |
| Revolutions per mile (km) | 651.58 (404.87) | 649.51 (403.59) | -2.07 (-1.28) -0.3% |
255/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.29 km/h) |
| 25 mph (40.23 km/h) | 25.08 mph (40.36 km/h) |
| 30 mph (48.28 km/h) | 30.1 mph (48.43 km/h) |
| 35 mph (56.33 km/h) | 35.11 mph (56.51 km/h) |
| 40 mph (64.37 km/h) | 40.13 mph (64.58 km/h) |
| 45 mph (72.42 km/h) | 45.14 mph (72.65 km/h) |
| 50 mph (80.47 km/h) | 50.16 mph (80.72 km/h) |
| 55 mph (88.51 km/h) | 55.17 mph (88.8 km/h) |
| 60 mph (96.56 km/h) | 60.19 mph (96.87 km/h) |
| 65 mph (104.61 km/h) | 65.21 mph (104.94 km/h) |
| 70 mph (112.65 km/h) | 70.22 mph (113.01 km/h) |
| 75 mph (120.7 km/h) | 75.24 mph (121.08 km/h) |
| 80 mph (128.75 km/h) | 80.25 mph (129.16 km/h) |
| 85 mph (136.79 km/h) | 85.27 mph (137.23 km/h) |
| 90 mph (144.84 km/h) | 90.29 mph (145.3 km/h) |
| 95 mph (152.89 km/h) | 95.3 mph (153.37 km/h) |
| 100 mph (160.93 km/h) | 100.32 mph (161.45 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1920 | 2068 | 2159 | 2258 | 2328 | 2405 | 2497 | 2624 | 2750 | 2891 | 3003 | 3207 | 3432 | 3608 | 3721 | 3784 | 4016 | 4340 | 5043 |
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