Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-19 | 305/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.2 (640.1) | 37.21 (945.2) | 12.01 (305.1) 47.7% |
| Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
| Circum. inches (mm) | 79.17 (2010.93) | 116.91 (2969.43) | 37.74 (958.5) 47.7% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 9.61 (244) | 6.51 (165.25) 209.8% |
| Revolutions per mile (km) | 800.3 (497.28) | 541.97 (336.76) | -258.33 (-160.52) -32.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.53 mph (47.53 km/h) |
| 25 mph (40.23 km/h) | 36.92 mph (59.41 km/h) |
| 30 mph (48.28 km/h) | 44.3 mph (71.29 km/h) |
| 35 mph (56.33 km/h) | 51.68 mph (83.18 km/h) |
| 40 mph (64.37 km/h) | 59.07 mph (95.06 km/h) |
| 45 mph (72.42 km/h) | 66.45 mph (106.94 km/h) |
| 50 mph (80.47 km/h) | 73.83 mph (118.82 km/h) |
| 55 mph (88.51 km/h) | 81.22 mph (130.7 km/h) |
| 60 mph (96.56 km/h) | 88.6 mph (142.59 km/h) |
| 65 mph (104.61 km/h) | 95.98 mph (154.47 km/h) |
| 70 mph (112.65 km/h) | 103.37 mph (166.35 km/h) |
| 75 mph (120.7 km/h) | 110.75 mph (178.23 km/h) |
| 80 mph (128.75 km/h) | 118.13 mph (190.11 km/h) |
| 85 mph (136.79 km/h) | 125.51 mph (202 km/h) |
| 90 mph (144.84 km/h) | 132.9 mph (213.88 km/h) |
| 95 mph (152.89 km/h) | 140.28 mph (225.76 km/h) |
| 100 mph (160.93 km/h) | 147.66 mph (237.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1379 | 1602 | 1725 | 1802 | 1884 | 1943 | 2007 | 2083 | 2189 | 2295 | 2412 | 2506 | 2676 | 2864 | 3011 | 3105 | 3158 | 3351 | 3621 | 4208 |
Better Fuel Economy Factory Ratios Increased Power
