Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 155/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 25.54 (648.8) | -0.45 (-11.4) -1.7% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 81.66 (2074.08) | 80.25 (2038.27) | -1.41 (-35.81) -1.7% |
| Sidewall Height inches (mm) | 4 (101.5) | 4.27 (108.5) | 0.28 (7) 6.9% |
| Revolutions per mile (km) | 775.93 (482.14) | 789.57 (490.61) | 13.63 (8.47) 1.8% |
155/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.63 km/h) |
| 25 mph (40.23 km/h) | 24.57 mph (39.54 km/h) |
| 30 mph (48.28 km/h) | 29.48 mph (47.45 km/h) |
| 35 mph (56.33 km/h) | 34.4 mph (55.35 km/h) |
| 40 mph (64.37 km/h) | 39.31 mph (63.26 km/h) |
| 45 mph (72.42 km/h) | 44.22 mph (71.17 km/h) |
| 50 mph (80.47 km/h) | 49.14 mph (79.08 km/h) |
| 55 mph (88.51 km/h) | 54.05 mph (86.99 km/h) |
| 60 mph (96.56 km/h) | 58.96 mph (94.89 km/h) |
| 65 mph (104.61 km/h) | 63.88 mph (102.8 km/h) |
| 70 mph (112.65 km/h) | 68.79 mph (110.71 km/h) |
| 75 mph (120.7 km/h) | 73.7 mph (118.62 km/h) |
| 80 mph (128.75 km/h) | 78.62 mph (126.52 km/h) |
| 85 mph (136.79 km/h) | 83.53 mph (134.43 km/h) |
| 90 mph (144.84 km/h) | 88.45 mph (142.34 km/h) |
| 95 mph (152.89 km/h) | 93.36 mph (150.25 km/h) |
| 100 mph (160.93 km/h) | 98.27 mph (158.16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2009 | 2334 | 2514 | 2625 | 2745 | 2830 | 2924 | 3035 | 3189 | 3343 | 3514 | 3651 | 3899 | 4172 | 4386 | 4523 | 4600 | 4882 | 5275 | 6130 |
Better Fuel Economy Factory Ratios Increased Power
