Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/90-18 | 195/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736.2) | 29.52 (749.7) | 0.53 (13.5) 1.8% |
| Width inches (mm) | 6.1 (155) | 7.68 (195) | 1.57 (40) 25.8% |
| Circum. inches (mm) | 91.06 (2312.84) | 92.73 (2355.25) | 1.67 (42.41) 1.8% |
| Sidewall Height inches (mm) | 5.49 (139.5) | 5.76 (146.25) | 0.27 (6.75) 4.8% |
| Revolutions per mile (km) | 695.83 (432.37) | 683.3 (424.58) | -12.53 (-7.79) -1.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.37 mph (32.78 km/h) |
| 25 mph (40.23 km/h) | 25.46 mph (40.97 km/h) |
| 30 mph (48.28 km/h) | 30.55 mph (49.17 km/h) |
| 35 mph (56.33 km/h) | 35.64 mph (57.36 km/h) |
| 40 mph (64.37 km/h) | 40.73 mph (65.55 km/h) |
| 45 mph (72.42 km/h) | 45.83 mph (73.75 km/h) |
| 50 mph (80.47 km/h) | 50.92 mph (81.94 km/h) |
| 55 mph (88.51 km/h) | 56.01 mph (90.14 km/h) |
| 60 mph (96.56 km/h) | 61.1 mph (98.33 km/h) |
| 65 mph (104.61 km/h) | 66.19 mph (106.53 km/h) |
| 70 mph (112.65 km/h) | 71.28 mph (114.72 km/h) |
| 75 mph (120.7 km/h) | 76.38 mph (122.91 km/h) |
| 80 mph (128.75 km/h) | 81.47 mph (131.11 km/h) |
| 85 mph (136.79 km/h) | 86.56 mph (139.3 km/h) |
| 90 mph (144.84 km/h) | 91.65 mph (147.5 km/h) |
| 95 mph (152.89 km/h) | 96.74 mph (155.69 km/h) |
| 100 mph (160.93 km/h) | 101.83 mph (163.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1739 | 2020 | 2175 | 2272 | 2375 | 2449 | 2531 | 2627 | 2760 | 2893 | 3041 | 3160 | 3374 | 3611 | 3796 | 3914 | 3981 | 4225 | 4565 | 5305 |
Better Fuel Economy Factory Ratios Increased Power
