Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-19 | 305/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.2 (640.1) | 38.41 (975.7) | 13.21 (335.6) 52.4% |
| Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
| Circum. inches (mm) | 79.17 (2010.93) | 120.68 (3065.25) | 41.51 (1054.32) 52.4% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 10.21 (259.25) | 7.11 (180.5) 229.2% |
| Revolutions per mile (km) | 800.3 (497.28) | 525.03 (326.24) | -275.27 (-171.04) -34.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.49 mph (49.06 km/h) |
| 25 mph (40.23 km/h) | 38.11 mph (61.33 km/h) |
| 30 mph (48.28 km/h) | 45.73 mph (73.59 km/h) |
| 35 mph (56.33 km/h) | 53.35 mph (85.86 km/h) |
| 40 mph (64.37 km/h) | 60.97 mph (98.12 km/h) |
| 45 mph (72.42 km/h) | 68.59 mph (110.39 km/h) |
| 50 mph (80.47 km/h) | 76.21 mph (122.66 km/h) |
| 55 mph (88.51 km/h) | 83.84 mph (134.92 km/h) |
| 60 mph (96.56 km/h) | 91.46 mph (147.19 km/h) |
| 65 mph (104.61 km/h) | 99.08 mph (159.45 km/h) |
| 70 mph (112.65 km/h) | 106.7 mph (171.72 km/h) |
| 75 mph (120.7 km/h) | 114.32 mph (183.98 km/h) |
| 80 mph (128.75 km/h) | 121.94 mph (196.25 km/h) |
| 85 mph (136.79 km/h) | 129.56 mph (208.51 km/h) |
| 90 mph (144.84 km/h) | 137.19 mph (220.78 km/h) |
| 95 mph (152.89 km/h) | 144.81 mph (233.05 km/h) |
| 100 mph (160.93 km/h) | 152.43 mph (245.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1336 | 1552 | 1672 | 1745 | 1825 | 1882 | 1944 | 2018 | 2121 | 2223 | 2337 | 2428 | 2593 | 2775 | 2917 | 3008 | 3059 | 3246 | 3508 | 4077 |
Better Fuel Economy Factory Ratios Increased Power
