Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/70-14 | 42/18.5-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.5 (698.6) | 41.84 (1062.8) | 14.34 (364.2) 52.1% |
| Width inches (mm) | 9.65 (245) | 18.5 (470) | 8.86 (225) 91.8% |
| Circum. inches (mm) | 86.41 (2194.72) | 131.45 (3338.88) | 45.05 (1144.17) 52.1% |
| Sidewall Height inches (mm) | 6.75 (171.5) | 5.92 (150.4) | -0.83 (-21.1) -12.3% |
| Revolutions per mile (km) | 733.28 (455.64) | 482 (299.5) | -251.28 (-156.14) -34.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.43 mph (48.97 km/h) |
| 25 mph (40.23 km/h) | 38.03 mph (61.21 km/h) |
| 30 mph (48.28 km/h) | 45.64 mph (73.45 km/h) |
| 35 mph (56.33 km/h) | 53.25 mph (85.69 km/h) |
| 40 mph (64.37 km/h) | 60.85 mph (97.93 km/h) |
| 45 mph (72.42 km/h) | 68.46 mph (110.18 km/h) |
| 50 mph (80.47 km/h) | 76.07 mph (122.42 km/h) |
| 55 mph (88.51 km/h) | 83.67 mph (134.66 km/h) |
| 60 mph (96.56 km/h) | 91.28 mph (146.9 km/h) |
| 65 mph (104.61 km/h) | 98.89 mph (159.14 km/h) |
| 70 mph (112.65 km/h) | 106.49 mph (171.38 km/h) |
| 75 mph (120.7 km/h) | 114.1 mph (183.63 km/h) |
| 80 mph (128.75 km/h) | 121.71 mph (195.87 km/h) |
| 85 mph (136.79 km/h) | 129.31 mph (208.11 km/h) |
| 90 mph (144.84 km/h) | 136.92 mph (220.35 km/h) |
| 95 mph (152.89 km/h) | 144.53 mph (232.59 km/h) |
| 100 mph (160.93 km/h) | 152.13 mph (244.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1227 | 1425 | 1535 | 1602 | 1675 | 1728 | 1785 | 1853 | 1947 | 2041 | 2145 | 2229 | 2380 | 2547 | 2678 | 2761 | 2808 | 2980 | 3220 | 3742 |
Better Fuel Economy Factory Ratios Increased Power
