Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 310/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 33.87 (860.2) | 4.17 (106) 14.1% |
| Width inches (mm) | 6.5 (165) | 12.2 (310) | 5.71 (145) 87.9% |
| Circum. inches (mm) | 93.28 (2369.39) | 106.39 (2702.4) | 13.11 (333.01) 14.1% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 7.93 (201.5) | 2.09 (53) 35.7% |
| Revolutions per mile (km) | 679.22 (422.05) | 595.52 (370.04) | -83.7 (-52.01) -12.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.81 mph (36.71 km/h) |
| 25 mph (40.23 km/h) | 28.51 mph (45.89 km/h) |
| 30 mph (48.28 km/h) | 34.22 mph (55.07 km/h) |
| 35 mph (56.33 km/h) | 39.92 mph (64.24 km/h) |
| 40 mph (64.37 km/h) | 45.62 mph (73.42 km/h) |
| 45 mph (72.42 km/h) | 51.32 mph (82.6 km/h) |
| 50 mph (80.47 km/h) | 57.03 mph (91.78 km/h) |
| 55 mph (88.51 km/h) | 62.73 mph (100.95 km/h) |
| 60 mph (96.56 km/h) | 68.43 mph (110.13 km/h) |
| 65 mph (104.61 km/h) | 74.14 mph (119.31 km/h) |
| 70 mph (112.65 km/h) | 79.84 mph (128.49 km/h) |
| 75 mph (120.7 km/h) | 85.54 mph (137.67 km/h) |
| 80 mph (128.75 km/h) | 91.24 mph (146.84 km/h) |
| 85 mph (136.79 km/h) | 96.95 mph (156.02 km/h) |
| 90 mph (144.84 km/h) | 102.65 mph (165.2 km/h) |
| 95 mph (152.89 km/h) | 108.35 mph (174.38 km/h) |
| 100 mph (160.93 km/h) | 114.05 mph (183.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1515 | 1761 | 1896 | 1980 | 2070 | 2135 | 2206 | 2289 | 2405 | 2522 | 2651 | 2754 | 2941 | 3147 | 3308 | 3411 | 3470 | 3682 | 3979 | 4624 |
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