Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-18 | 315/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.6 (929.7) | 34.12 (866.7) | -2.48 (-63) -6.8% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 114.99 (2920.74) | 107.2 (2722.82) | -7.79 (-197.92) -6.8% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 8.06 (204.75) | -1.24 (-31.5) -13.3% |
| Revolutions per mile (km) | 551.01 (342.38) | 591.06 (367.27) | 40.05 (24.89) 7.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.64 mph (30.01 km/h) |
| 25 mph (40.23 km/h) | 23.31 mph (37.51 km/h) |
| 30 mph (48.28 km/h) | 27.97 mph (45.01 km/h) |
| 35 mph (56.33 km/h) | 32.63 mph (52.51 km/h) |
| 40 mph (64.37 km/h) | 37.29 mph (60.01 km/h) |
| 45 mph (72.42 km/h) | 41.95 mph (67.51 km/h) |
| 50 mph (80.47 km/h) | 46.61 mph (75.01 km/h) |
| 55 mph (88.51 km/h) | 51.27 mph (82.52 km/h) |
| 60 mph (96.56 km/h) | 55.93 mph (90.02 km/h) |
| 65 mph (104.61 km/h) | 60.6 mph (97.52 km/h) |
| 70 mph (112.65 km/h) | 65.26 mph (105.02 km/h) |
| 75 mph (120.7 km/h) | 69.92 mph (112.52 km/h) |
| 80 mph (128.75 km/h) | 74.58 mph (120.02 km/h) |
| 85 mph (136.79 km/h) | 79.24 mph (127.52 km/h) |
| 90 mph (144.84 km/h) | 83.9 mph (135.03 km/h) |
| 95 mph (152.89 km/h) | 88.56 mph (142.53 km/h) |
| 100 mph (160.93 km/h) | 93.22 mph (150.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1504 | 1747 | 1882 | 1965 | 2055 | 2119 | 2189 | 2272 | 2387 | 2503 | 2631 | 2733 | 2919 | 3123 | 3283 | 3386 | 3443 | 3655 | 3949 | 4589 |
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