Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-18 | 275/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.97 (634.2) | 26.66 (677.2) | 1.69 (43) 6.8% |
| Width inches (mm) | 11.61 (295) | 10.83 (275) | -0.79 (-20) -6.8% |
| Circum. inches (mm) | 78.44 (1992.4) | 83.76 (2127.49) | 5.32 (135.09) 6.8% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 4.33 (110) | 0.85 (21.5) 24.3% |
| Revolutions per mile (km) | 807.74 (501.91) | 756.45 (470.04) | -51.29 (-31.87) -6.3% |
275/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.37 km/h) |
| 25 mph (40.23 km/h) | 26.7 mph (42.96 km/h) |
| 30 mph (48.28 km/h) | 32.03 mph (51.55 km/h) |
| 35 mph (56.33 km/h) | 37.37 mph (60.15 km/h) |
| 40 mph (64.37 km/h) | 42.71 mph (68.74 km/h) |
| 45 mph (72.42 km/h) | 48.05 mph (77.33 km/h) |
| 50 mph (80.47 km/h) | 53.39 mph (85.92 km/h) |
| 55 mph (88.51 km/h) | 58.73 mph (94.52 km/h) |
| 60 mph (96.56 km/h) | 64.07 mph (103.11 km/h) |
| 65 mph (104.61 km/h) | 69.41 mph (111.7 km/h) |
| 70 mph (112.65 km/h) | 74.75 mph (120.29 km/h) |
| 75 mph (120.7 km/h) | 80.09 mph (128.88 km/h) |
| 80 mph (128.75 km/h) | 85.42 mph (137.48 km/h) |
| 85 mph (136.79 km/h) | 90.76 mph (146.07 km/h) |
| 90 mph (144.84 km/h) | 96.1 mph (154.66 km/h) |
| 95 mph (152.89 km/h) | 101.44 mph (163.25 km/h) |
| 100 mph (160.93 km/h) | 106.78 mph (171.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1925 | 2236 | 2408 | 2515 | 2630 | 2711 | 2802 | 2908 | 3055 | 3203 | 3367 | 3498 | 3735 | 3998 | 4202 | 4333 | 4407 | 4677 | 5054 | 5873 |
Better Fuel Economy Factory Ratios Increased Power
