Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 290/90-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 40.55 (1030) | 10.15 (257.8) 33.4% |
| Width inches (mm) | 6.89 (175) | 11.42 (290) | 4.53 (115) 65.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 127.4 (3235.84) | 31.89 (809.9) 33.4% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 10.28 (261) | 4.07 (103.5) 65.7% |
| Revolutions per mile (km) | 663.39 (412.21) | 497.35 (309.04) | -166.04 (-103.17) -25% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.68 mph (42.93 km/h) |
| 25 mph (40.23 km/h) | 33.35 mph (53.67 km/h) |
| 30 mph (48.28 km/h) | 40.02 mph (64.4 km/h) |
| 35 mph (56.33 km/h) | 46.68 mph (75.13 km/h) |
| 40 mph (64.37 km/h) | 53.35 mph (85.87 km/h) |
| 45 mph (72.42 km/h) | 60.02 mph (96.6 km/h) |
| 50 mph (80.47 km/h) | 66.69 mph (107.33 km/h) |
| 55 mph (88.51 km/h) | 73.36 mph (118.06 km/h) |
| 60 mph (96.56 km/h) | 80.03 mph (128.8 km/h) |
| 65 mph (104.61 km/h) | 86.7 mph (139.53 km/h) |
| 70 mph (112.65 km/h) | 93.37 mph (150.26 km/h) |
| 75 mph (120.7 km/h) | 100.04 mph (161 km/h) |
| 80 mph (128.75 km/h) | 106.71 mph (171.73 km/h) |
| 85 mph (136.79 km/h) | 113.38 mph (182.46 km/h) |
| 90 mph (144.84 km/h) | 120.05 mph (193.2 km/h) |
| 95 mph (152.89 km/h) | 126.72 mph (203.93 km/h) |
| 100 mph (160.93 km/h) | 133.39 mph (214.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1266 | 1470 | 1583 | 1653 | 1729 | 1783 | 1842 | 1912 | 2009 | 2106 | 2214 | 2300 | 2456 | 2628 | 2763 | 2849 | 2898 | 3075 | 3323 | 3862 |
Better Fuel Economy Factory Ratios Increased Power
