Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-18 | 275/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.6 (929.7) | 34.24 (869.7) | -2.36 (-60) -6.5% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 114.99 (2920.74) | 107.57 (2732.24) | -7.42 (-188.5) -6.5% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 8.12 (206.25) | -1.18 (-30) -12.7% |
| Revolutions per mile (km) | 551.01 (342.38) | 589.02 (366) | 38.01 (23.62) 6.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.71 mph (30.11 km/h) |
| 25 mph (40.23 km/h) | 23.39 mph (37.64 km/h) |
| 30 mph (48.28 km/h) | 28.06 mph (45.16 km/h) |
| 35 mph (56.33 km/h) | 32.74 mph (52.69 km/h) |
| 40 mph (64.37 km/h) | 37.42 mph (60.22 km/h) |
| 45 mph (72.42 km/h) | 42.1 mph (67.75 km/h) |
| 50 mph (80.47 km/h) | 46.77 mph (75.27 km/h) |
| 55 mph (88.51 km/h) | 51.45 mph (82.8 km/h) |
| 60 mph (96.56 km/h) | 56.13 mph (90.33 km/h) |
| 65 mph (104.61 km/h) | 60.81 mph (97.86 km/h) |
| 70 mph (112.65 km/h) | 65.48 mph (105.38 km/h) |
| 75 mph (120.7 km/h) | 70.16 mph (112.91 km/h) |
| 80 mph (128.75 km/h) | 74.84 mph (120.44 km/h) |
| 85 mph (136.79 km/h) | 79.51 mph (127.97 km/h) |
| 90 mph (144.84 km/h) | 84.19 mph (135.49 km/h) |
| 95 mph (152.89 km/h) | 88.87 mph (143.02 km/h) |
| 100 mph (160.93 km/h) | 93.55 mph (150.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1499 | 1741 | 1875 | 1958 | 2047 | 2111 | 2181 | 2264 | 2379 | 2494 | 2622 | 2724 | 2909 | 3113 | 3272 | 3374 | 3432 | 3642 | 3936 | 4573 |
Better Fuel Economy Factory Ratios Increased Power
