Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 145/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 24.99 (634.8) | -1.51 (-38.4) -5.7% |
| Width inches (mm) | 5.31 (135) | 5.71 (145) | 0.39 (10) 7.4% |
| Circum. inches (mm) | 83.26 (2114.92) | 78.52 (1994.28) | -4.75 (-120.64) -5.7% |
| Sidewall Height inches (mm) | 4.25 (108) | 4 (101.5) | -0.26 (-6.5) -6% |
| Revolutions per mile (km) | 760.95 (472.83) | 806.98 (501.43) | 46.03 (28.6) 6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.86 mph (30.35 km/h) |
| 25 mph (40.23 km/h) | 23.57 mph (37.94 km/h) |
| 30 mph (48.28 km/h) | 28.29 mph (45.53 km/h) |
| 35 mph (56.33 km/h) | 33 mph (53.11 km/h) |
| 40 mph (64.37 km/h) | 37.72 mph (60.7 km/h) |
| 45 mph (72.42 km/h) | 42.43 mph (68.29 km/h) |
| 50 mph (80.47 km/h) | 47.15 mph (75.88 km/h) |
| 55 mph (88.51 km/h) | 51.86 mph (83.47 km/h) |
| 60 mph (96.56 km/h) | 56.58 mph (91.05 km/h) |
| 65 mph (104.61 km/h) | 61.29 mph (98.64 km/h) |
| 70 mph (112.65 km/h) | 66.01 mph (106.23 km/h) |
| 75 mph (120.7 km/h) | 70.72 mph (113.82 km/h) |
| 80 mph (128.75 km/h) | 75.44 mph (121.4 km/h) |
| 85 mph (136.79 km/h) | 80.15 mph (128.99 km/h) |
| 90 mph (144.84 km/h) | 84.87 mph (136.58 km/h) |
| 95 mph (152.89 km/h) | 89.58 mph (144.17 km/h) |
| 100 mph (160.93 km/h) | 94.3 mph (151.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2054 | 2386 | 2569 | 2683 | 2805 | 2893 | 2989 | 3102 | 3260 | 3417 | 3592 | 3731 | 3985 | 4265 | 4483 | 4623 | 4701 | 4990 | 5392 | 6266 |
Better Fuel Economy Factory Ratios Increased Power
