Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-18 | 290/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.97 (634.2) | 27.13 (689.2) | 2.17 (55) 8.7% |
| Width inches (mm) | 11.61 (295) | 11.42 (290) | -0.2 (-5) -1.7% |
| Circum. inches (mm) | 78.44 (1992.4) | 85.24 (2165.19) | 6.8 (172.79) 8.7% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 4.57 (116) | 1.08 (27.5) 31.1% |
| Revolutions per mile (km) | 807.74 (501.91) | 743.28 (461.85) | -64.46 (-40.05) -8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.98 km/h) |
| 25 mph (40.23 km/h) | 27.17 mph (43.72 km/h) |
| 30 mph (48.28 km/h) | 32.6 mph (52.47 km/h) |
| 35 mph (56.33 km/h) | 38.04 mph (61.21 km/h) |
| 40 mph (64.37 km/h) | 43.47 mph (69.96 km/h) |
| 45 mph (72.42 km/h) | 48.9 mph (78.7 km/h) |
| 50 mph (80.47 km/h) | 54.34 mph (87.45 km/h) |
| 55 mph (88.51 km/h) | 59.77 mph (96.19 km/h) |
| 60 mph (96.56 km/h) | 65.2 mph (104.93 km/h) |
| 65 mph (104.61 km/h) | 70.64 mph (113.68 km/h) |
| 70 mph (112.65 km/h) | 76.07 mph (122.42 km/h) |
| 75 mph (120.7 km/h) | 81.5 mph (131.17 km/h) |
| 80 mph (128.75 km/h) | 86.94 mph (139.91 km/h) |
| 85 mph (136.79 km/h) | 92.37 mph (148.66 km/h) |
| 90 mph (144.84 km/h) | 97.81 mph (157.4 km/h) |
| 95 mph (152.89 km/h) | 103.24 mph (166.15 km/h) |
| 100 mph (160.93 km/h) | 108.67 mph (174.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1892 | 2197 | 2366 | 2471 | 2584 | 2664 | 2753 | 2857 | 3002 | 3147 | 3308 | 3437 | 3670 | 3928 | 4129 | 4258 | 4330 | 4596 | 4966 | 5771 |
Better Fuel Economy Factory Ratios Increased Power
