Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/85-14 | 255/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.38 (670.1) | 30.05 (763.2) | 3.67 (93.1) 13.9% |
| Width inches (mm) | 7.28 (185) | 10.04 (255) | 2.76 (70) 37.8% |
| Circum. inches (mm) | 82.88 (2105.18) | 94.4 (2397.66) | 11.52 (292.48) 13.9% |
| Sidewall Height inches (mm) | 6.19 (157.25) | 6.02 (153) | -0.17 (-4.25) -2.7% |
| Revolutions per mile (km) | 764.47 (475.02) | 671.21 (417.07) | -93.25 (-57.95) -12.2% |
255/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.78 mph (36.66 km/h) |
| 25 mph (40.23 km/h) | 28.47 mph (45.82 km/h) |
| 30 mph (48.28 km/h) | 34.17 mph (54.99 km/h) |
| 35 mph (56.33 km/h) | 39.86 mph (64.15 km/h) |
| 40 mph (64.37 km/h) | 45.56 mph (73.32 km/h) |
| 45 mph (72.42 km/h) | 51.25 mph (82.48 km/h) |
| 50 mph (80.47 km/h) | 56.95 mph (91.65 km/h) |
| 55 mph (88.51 km/h) | 62.64 mph (100.81 km/h) |
| 60 mph (96.56 km/h) | 68.34 mph (109.98 km/h) |
| 65 mph (104.61 km/h) | 74.03 mph (119.14 km/h) |
| 70 mph (112.65 km/h) | 79.73 mph (128.31 km/h) |
| 75 mph (120.7 km/h) | 85.42 mph (137.47 km/h) |
| 80 mph (128.75 km/h) | 91.11 mph (146.64 km/h) |
| 85 mph (136.79 km/h) | 96.81 mph (155.8 km/h) |
| 90 mph (144.84 km/h) | 102.5 mph (164.96 km/h) |
| 95 mph (152.89 km/h) | 108.2 mph (174.13 km/h) |
| 100 mph (160.93 km/h) | 113.89 mph (183.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1708 | 1984 | 2137 | 2231 | 2333 | 2406 | 2486 | 2580 | 2711 | 2842 | 2987 | 3104 | 3314 | 3547 | 3729 | 3845 | 3910 | 4150 | 4485 | 5212 |
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