Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 130/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 27.21 (691.2) | 1.22 (31) 4.7% |
| Width inches (mm) | 5.71 (145) | 5.12 (130) | -0.59 (-15) -10.3% |
| Circum. inches (mm) | 81.66 (2074.08) | 85.49 (2171.47) | 3.83 (97.39) 4.7% |
| Sidewall Height inches (mm) | 4 (101.5) | 4.61 (117) | 0.61 (15.5) 15.3% |
| Revolutions per mile (km) | 775.93 (482.14) | 741.13 (460.52) | -34.8 (-21.62) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.7 km/h) |
| 25 mph (40.23 km/h) | 26.17 mph (42.12 km/h) |
| 30 mph (48.28 km/h) | 31.41 mph (50.55 km/h) |
| 35 mph (56.33 km/h) | 36.64 mph (58.97 km/h) |
| 40 mph (64.37 km/h) | 41.88 mph (67.4 km/h) |
| 45 mph (72.42 km/h) | 47.11 mph (75.82 km/h) |
| 50 mph (80.47 km/h) | 52.35 mph (84.25 km/h) |
| 55 mph (88.51 km/h) | 57.58 mph (92.67 km/h) |
| 60 mph (96.56 km/h) | 62.82 mph (101.09 km/h) |
| 65 mph (104.61 km/h) | 68.05 mph (109.52 km/h) |
| 70 mph (112.65 km/h) | 73.29 mph (117.94 km/h) |
| 75 mph (120.7 km/h) | 78.52 mph (126.37 km/h) |
| 80 mph (128.75 km/h) | 83.76 mph (134.79 km/h) |
| 85 mph (136.79 km/h) | 88.99 mph (143.22 km/h) |
| 90 mph (144.84 km/h) | 94.23 mph (151.64 km/h) |
| 95 mph (152.89 km/h) | 99.46 mph (160.07 km/h) |
| 100 mph (160.93 km/h) | 104.7 mph (168.49 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1886 | 2191 | 2360 | 2464 | 2576 | 2657 | 2745 | 2849 | 2994 | 3138 | 3299 | 3427 | 3660 | 3917 | 4117 | 4246 | 4318 | 4583 | 4952 | 5754 |
Better Fuel Economy Factory Ratios Increased Power
