Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/70-18 | 315/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.36 (898.2) | 34.12 (866.7) | -1.24 (-31.5) -3.5% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 111.09 (2821.78) | 107.2 (2722.82) | -3.9 (-98.96) -3.5% |
| Sidewall Height inches (mm) | 8.68 (220.5) | 8.06 (204.75) | -0.62 (-15.75) -7.1% |
| Revolutions per mile (km) | 570.33 (354.39) | 591.06 (367.27) | 20.73 (12.88) 3.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.3 mph (31.06 km/h) |
| 25 mph (40.23 km/h) | 24.12 mph (38.82 km/h) |
| 30 mph (48.28 km/h) | 28.95 mph (46.59 km/h) |
| 35 mph (56.33 km/h) | 33.77 mph (54.35 km/h) |
| 40 mph (64.37 km/h) | 38.6 mph (62.12 km/h) |
| 45 mph (72.42 km/h) | 43.42 mph (69.88 km/h) |
| 50 mph (80.47 km/h) | 48.25 mph (77.65 km/h) |
| 55 mph (88.51 km/h) | 53.07 mph (85.41 km/h) |
| 60 mph (96.56 km/h) | 57.9 mph (93.17 km/h) |
| 65 mph (104.61 km/h) | 62.72 mph (100.94 km/h) |
| 70 mph (112.65 km/h) | 67.55 mph (108.7 km/h) |
| 75 mph (120.7 km/h) | 72.37 mph (116.47 km/h) |
| 80 mph (128.75 km/h) | 77.19 mph (124.23 km/h) |
| 85 mph (136.79 km/h) | 82.02 mph (132 km/h) |
| 90 mph (144.84 km/h) | 86.84 mph (139.76 km/h) |
| 95 mph (152.89 km/h) | 91.67 mph (147.53 km/h) |
| 100 mph (160.93 km/h) | 96.49 mph (155.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1504 | 1747 | 1882 | 1965 | 2055 | 2119 | 2189 | 2272 | 2387 | 2503 | 2631 | 2733 | 2919 | 3123 | 3283 | 3386 | 3443 | 3655 | 3949 | 4589 |
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