Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/80-18 | 120/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.82 (681.2) | 27.45 (697.2) | 0.63 (16) 2.3% |
| Width inches (mm) | 5.51 (140) | 4.72 (120) | -0.79 (-20) -14.3% |
| Circum. inches (mm) | 84.25 (2140.05) | 86.23 (2190.32) | 1.98 (50.27) 2.3% |
| Sidewall Height inches (mm) | 4.41 (112) | 4.72 (120) | 0.31 (8) 7.1% |
| Revolutions per mile (km) | 752.01 (467.28) | 734.75 (456.55) | -17.26 (-10.72) -2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.47 mph (32.94 km/h) |
| 25 mph (40.23 km/h) | 25.59 mph (41.18 km/h) |
| 30 mph (48.28 km/h) | 30.7 mph (49.41 km/h) |
| 35 mph (56.33 km/h) | 35.82 mph (57.65 km/h) |
| 40 mph (64.37 km/h) | 40.94 mph (65.89 km/h) |
| 45 mph (72.42 km/h) | 46.06 mph (74.12 km/h) |
| 50 mph (80.47 km/h) | 51.17 mph (82.36 km/h) |
| 55 mph (88.51 km/h) | 56.29 mph (90.59 km/h) |
| 60 mph (96.56 km/h) | 61.41 mph (98.83 km/h) |
| 65 mph (104.61 km/h) | 66.53 mph (107.06 km/h) |
| 70 mph (112.65 km/h) | 71.64 mph (115.3 km/h) |
| 75 mph (120.7 km/h) | 76.76 mph (123.54 km/h) |
| 80 mph (128.75 km/h) | 81.88 mph (131.77 km/h) |
| 85 mph (136.79 km/h) | 87 mph (140.01 km/h) |
| 90 mph (144.84 km/h) | 92.11 mph (148.24 km/h) |
| 95 mph (152.89 km/h) | 97.23 mph (156.48 km/h) |
| 100 mph (160.93 km/h) | 102.35 mph (164.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1870 | 2172 | 2339 | 2443 | 2554 | 2634 | 2721 | 2825 | 2968 | 3111 | 3270 | 3397 | 3628 | 3883 | 4082 | 4209 | 4281 | 4543 | 4909 | 5705 |
Better Fuel Economy Factory Ratios Increased Power
