Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/40-19 | 275/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.92 (734.6) | 28.83 (732.2) | -0.09 (-2.4) -0.3% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 90.86 (2307.81) | 90.56 (2300.27) | -0.3 (-7.54) -0.3% |
| Sidewall Height inches (mm) | 4.96 (126) | 5.41 (137.5) | 0.45 (11.5) 9.1% |
| Revolutions per mile (km) | 697.35 (433.31) | 699.63 (434.73) | 2.29 (1.42) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.93 mph (32.08 km/h) |
| 25 mph (40.23 km/h) | 24.92 mph (40.1 km/h) |
| 30 mph (48.28 km/h) | 29.9 mph (48.12 km/h) |
| 35 mph (56.33 km/h) | 34.89 mph (56.14 km/h) |
| 40 mph (64.37 km/h) | 39.87 mph (64.16 km/h) |
| 45 mph (72.42 km/h) | 44.85 mph (72.18 km/h) |
| 50 mph (80.47 km/h) | 49.84 mph (80.2 km/h) |
| 55 mph (88.51 km/h) | 54.82 mph (88.22 km/h) |
| 60 mph (96.56 km/h) | 59.8 mph (96.25 km/h) |
| 65 mph (104.61 km/h) | 64.79 mph (104.27 km/h) |
| 70 mph (112.65 km/h) | 69.77 mph (112.29 km/h) |
| 75 mph (120.7 km/h) | 74.75 mph (120.31 km/h) |
| 80 mph (128.75 km/h) | 79.74 mph (128.33 km/h) |
| 85 mph (136.79 km/h) | 84.72 mph (136.35 km/h) |
| 90 mph (144.84 km/h) | 89.71 mph (144.37 km/h) |
| 95 mph (152.89 km/h) | 94.69 mph (152.39 km/h) |
| 100 mph (160.93 km/h) | 99.67 mph (160.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1780 | 2068 | 2227 | 2326 | 2432 | 2508 | 2591 | 2690 | 2826 | 2962 | 3114 | 3235 | 3455 | 3697 | 3887 | 4008 | 4076 | 4326 | 4675 | 5432 |
Better Fuel Economy Factory Ratios Increased Power
