Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/80-18 | 140/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.82 (681.2) | 25.72 (653.2) | -1.1 (-28) -4.1% |
| Width inches (mm) | 5.51 (140) | 5.51 (140) | 0 (0) 0% |
| Circum. inches (mm) | 84.25 (2140.05) | 80.79 (2052.09) | -3.46 (-87.96) -4.1% |
| Sidewall Height inches (mm) | 4.41 (112) | 3.86 (98) | -0.55 (-14) -12.5% |
| Revolutions per mile (km) | 752.01 (467.28) | 784.25 (487.31) | 32.24 (20.03) 4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.18 mph (30.86 km/h) |
| 25 mph (40.23 km/h) | 23.97 mph (38.58 km/h) |
| 30 mph (48.28 km/h) | 28.77 mph (46.3 km/h) |
| 35 mph (56.33 km/h) | 33.56 mph (54.01 km/h) |
| 40 mph (64.37 km/h) | 38.36 mph (61.73 km/h) |
| 45 mph (72.42 km/h) | 43.15 mph (69.44 km/h) |
| 50 mph (80.47 km/h) | 47.94 mph (77.16 km/h) |
| 55 mph (88.51 km/h) | 52.74 mph (84.88 km/h) |
| 60 mph (96.56 km/h) | 57.53 mph (92.59 km/h) |
| 65 mph (104.61 km/h) | 62.33 mph (100.31 km/h) |
| 70 mph (112.65 km/h) | 67.12 mph (108.02 km/h) |
| 75 mph (120.7 km/h) | 71.92 mph (115.74 km/h) |
| 80 mph (128.75 km/h) | 76.71 mph (123.46 km/h) |
| 85 mph (136.79 km/h) | 81.51 mph (131.17 km/h) |
| 90 mph (144.84 km/h) | 86.3 mph (138.89 km/h) |
| 95 mph (152.89 km/h) | 91.1 mph (146.6 km/h) |
| 100 mph (160.93 km/h) | 95.89 mph (154.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 2318 | 2497 | 2607 | 2726 | 2811 | 2904 | 3015 | 3168 | 3321 | 3490 | 3626 | 3873 | 4144 | 4357 | 4493 | 4569 | 4849 | 5240 | 6089 |
Better Fuel Economy Factory Ratios Increased Power
