Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 155/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 26.54 (674.2) | 0.55 (14) 2.1% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 81.66 (2074.08) | 83.39 (2118.06) | 1.73 (43.98) 2.1% |
| Sidewall Height inches (mm) | 4 (101.5) | 4.27 (108.5) | 0.28 (7) 6.9% |
| Revolutions per mile (km) | 775.93 (482.14) | 759.82 (472.13) | -16.11 (-10.01) -2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.87 km/h) |
| 25 mph (40.23 km/h) | 25.53 mph (41.09 km/h) |
| 30 mph (48.28 km/h) | 30.64 mph (49.3 km/h) |
| 35 mph (56.33 km/h) | 35.74 mph (57.52 km/h) |
| 40 mph (64.37 km/h) | 40.85 mph (65.74 km/h) |
| 45 mph (72.42 km/h) | 45.95 mph (73.96 km/h) |
| 50 mph (80.47 km/h) | 51.06 mph (82.17 km/h) |
| 55 mph (88.51 km/h) | 56.17 mph (90.39 km/h) |
| 60 mph (96.56 km/h) | 61.27 mph (98.61 km/h) |
| 65 mph (104.61 km/h) | 66.38 mph (106.83 km/h) |
| 70 mph (112.65 km/h) | 71.48 mph (115.04 km/h) |
| 75 mph (120.7 km/h) | 76.59 mph (123.26 km/h) |
| 80 mph (128.75 km/h) | 81.7 mph (131.48 km/h) |
| 85 mph (136.79 km/h) | 86.8 mph (139.7 km/h) |
| 90 mph (144.84 km/h) | 91.91 mph (147.91 km/h) |
| 95 mph (152.89 km/h) | 97.01 mph (156.13 km/h) |
| 100 mph (160.93 km/h) | 102.12 mph (164.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1934 | 2246 | 2419 | 2526 | 2641 | 2723 | 2814 | 2921 | 3069 | 3217 | 3382 | 3513 | 3752 | 4015 | 4221 | 4353 | 4427 | 4698 | 5077 | 5900 |
Better Fuel Economy Factory Ratios Increased Power
