Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-17 | 145/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.54 (648.8) | 27.28 (692.8) | 1.73 (44) 6.8% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 80.25 (2038.27) | 85.69 (2176.5) | 5.44 (138.23) 6.8% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.14 (130.5) | 0.87 (22) 20.3% |
| Revolutions per mile (km) | 789.57 (490.61) | 739.42 (459.45) | -50.15 (-31.16) -6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.37 km/h) |
| 25 mph (40.23 km/h) | 26.7 mph (42.96 km/h) |
| 30 mph (48.28 km/h) | 32.03 mph (51.55 km/h) |
| 35 mph (56.33 km/h) | 37.37 mph (60.15 km/h) |
| 40 mph (64.37 km/h) | 42.71 mph (68.74 km/h) |
| 45 mph (72.42 km/h) | 48.05 mph (77.33 km/h) |
| 50 mph (80.47 km/h) | 53.39 mph (85.92 km/h) |
| 55 mph (88.51 km/h) | 58.73 mph (94.52 km/h) |
| 60 mph (96.56 km/h) | 64.07 mph (103.11 km/h) |
| 65 mph (104.61 km/h) | 69.41 mph (111.7 km/h) |
| 70 mph (112.65 km/h) | 74.75 mph (120.29 km/h) |
| 75 mph (120.7 km/h) | 80.09 mph (128.89 km/h) |
| 80 mph (128.75 km/h) | 85.43 mph (137.48 km/h) |
| 85 mph (136.79 km/h) | 90.76 mph (146.07 km/h) |
| 90 mph (144.84 km/h) | 96.1 mph (154.66 km/h) |
| 95 mph (152.89 km/h) | 101.44 mph (163.26 km/h) |
| 100 mph (160.93 km/h) | 106.78 mph (171.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1882 | 2186 | 2354 | 2458 | 2570 | 2650 | 2738 | 2843 | 2987 | 3131 | 3291 | 3419 | 3651 | 3907 | 4108 | 4236 | 4308 | 4572 | 4940 | 5741 |
Better Fuel Economy Factory Ratios Increased Power
