Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-19 | 315/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.2 (640.1) | 39.08 (992.7) | 13.88 (352.6) 55.1% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 79.17 (2010.93) | 122.78 (3118.66) | 43.61 (1107.73) 55.1% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 10.54 (267.75) | 7.44 (189) 240% |
| Revolutions per mile (km) | 800.3 (497.28) | 516.04 (320.65) | -284.26 (-176.63) -35.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 31.02 mph (49.92 km/h) |
| 25 mph (40.23 km/h) | 38.77 mph (62.4 km/h) |
| 30 mph (48.28 km/h) | 46.53 mph (74.88 km/h) |
| 35 mph (56.33 km/h) | 54.28 mph (87.36 km/h) |
| 40 mph (64.37 km/h) | 62.03 mph (99.83 km/h) |
| 45 mph (72.42 km/h) | 69.79 mph (112.31 km/h) |
| 50 mph (80.47 km/h) | 77.54 mph (124.79 km/h) |
| 55 mph (88.51 km/h) | 85.3 mph (137.27 km/h) |
| 60 mph (96.56 km/h) | 93.05 mph (149.75 km/h) |
| 65 mph (104.61 km/h) | 100.81 mph (162.23 km/h) |
| 70 mph (112.65 km/h) | 108.56 mph (174.71 km/h) |
| 75 mph (120.7 km/h) | 116.31 mph (187.19 km/h) |
| 80 mph (128.75 km/h) | 124.07 mph (199.67 km/h) |
| 85 mph (136.79 km/h) | 131.82 mph (212.15 km/h) |
| 90 mph (144.84 km/h) | 139.58 mph (224.63 km/h) |
| 95 mph (152.89 km/h) | 147.33 mph (237.11 km/h) |
| 100 mph (160.93 km/h) | 155.09 mph (249.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1313 | 1526 | 1643 | 1716 | 1794 | 1850 | 1911 | 1984 | 2084 | 2185 | 2297 | 2386 | 2548 | 2727 | 2867 | 2956 | 3006 | 3191 | 3448 | 4007 |
Better Fuel Economy Factory Ratios Increased Power
