Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 195/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 29.52 (749.7) | -0.89 (-22.5) -2.9% |
| Width inches (mm) | 6.89 (175) | 7.68 (195) | 0.79 (20) 11.4% |
| Circum. inches (mm) | 95.51 (2425.94) | 92.73 (2355.25) | -2.78 (-70.69) -2.9% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 5.76 (146.25) | -0.44 (-11.25) -7.1% |
| Revolutions per mile (km) | 663.39 (412.21) | 683.3 (424.58) | 19.91 (12.37) 3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.25 km/h) |
| 25 mph (40.23 km/h) | 24.27 mph (39.06 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.87 km/h) |
| 35 mph (56.33 km/h) | 33.98 mph (54.69 km/h) |
| 40 mph (64.37 km/h) | 38.83 mph (62.5 km/h) |
| 45 mph (72.42 km/h) | 43.69 mph (70.31 km/h) |
| 50 mph (80.47 km/h) | 48.54 mph (78.12 km/h) |
| 55 mph (88.51 km/h) | 53.4 mph (85.94 km/h) |
| 60 mph (96.56 km/h) | 58.25 mph (93.75 km/h) |
| 65 mph (104.61 km/h) | 63.11 mph (101.56 km/h) |
| 70 mph (112.65 km/h) | 67.96 mph (109.37 km/h) |
| 75 mph (120.7 km/h) | 72.81 mph (117.18 km/h) |
| 80 mph (128.75 km/h) | 77.67 mph (125 km/h) |
| 85 mph (136.79 km/h) | 82.52 mph (132.81 km/h) |
| 90 mph (144.84 km/h) | 87.38 mph (140.62 km/h) |
| 95 mph (152.89 km/h) | 92.23 mph (148.43 km/h) |
| 100 mph (160.93 km/h) | 97.09 mph (156.25 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
