Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-18 | 315/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.6 (929.7) | 35.36 (898.2) | -1.24 (-31.5) -3.4% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 114.99 (2920.74) | 111.09 (2821.78) | -3.9 (-98.96) -3.4% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 8.68 (220.5) | -0.62 (-15.75) -6.7% |
| Revolutions per mile (km) | 551.01 (342.38) | 570.33 (354.39) | 19.32 (12.01) 3.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.32 mph (31.1 km/h) |
| 25 mph (40.23 km/h) | 24.15 mph (38.87 km/h) |
| 30 mph (48.28 km/h) | 28.98 mph (46.64 km/h) |
| 35 mph (56.33 km/h) | 33.81 mph (54.42 km/h) |
| 40 mph (64.37 km/h) | 38.64 mph (62.19 km/h) |
| 45 mph (72.42 km/h) | 43.48 mph (69.97 km/h) |
| 50 mph (80.47 km/h) | 48.31 mph (77.74 km/h) |
| 55 mph (88.51 km/h) | 53.14 mph (85.52 km/h) |
| 60 mph (96.56 km/h) | 57.97 mph (93.29 km/h) |
| 65 mph (104.61 km/h) | 62.8 mph (101.06 km/h) |
| 70 mph (112.65 km/h) | 67.63 mph (108.84 km/h) |
| 75 mph (120.7 km/h) | 72.46 mph (116.61 km/h) |
| 80 mph (128.75 km/h) | 77.29 mph (124.39 km/h) |
| 85 mph (136.79 km/h) | 82.12 mph (132.16 km/h) |
| 90 mph (144.84 km/h) | 86.95 mph (139.93 km/h) |
| 95 mph (152.89 km/h) | 91.78 mph (147.71 km/h) |
| 100 mph (160.93 km/h) | 96.61 mph (155.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1451 | 1686 | 1816 | 1896 | 1983 | 2044 | 2112 | 2193 | 2304 | 2415 | 2538 | 2637 | 2816 | 3014 | 3168 | 3267 | 3323 | 3527 | 3811 | 4428 |
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