Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/100-18 | 140/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.45 (697.2) | 26.82 (681.2) | -0.63 (-16) -2.3% |
| Width inches (mm) | 4.72 (120) | 5.51 (140) | 0.79 (20) 16.7% |
| Circum. inches (mm) | 86.23 (2190.32) | 84.25 (2140.05) | -1.98 (-50.27) -2.3% |
| Sidewall Height inches (mm) | 4.72 (120) | 4.41 (112) | -0.31 (-8) -6.7% |
| Revolutions per mile (km) | 734.75 (456.55) | 752.01 (467.28) | 17.26 (10.72) 2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.54 mph (31.45 km/h) |
| 25 mph (40.23 km/h) | 24.43 mph (39.31 km/h) |
| 30 mph (48.28 km/h) | 29.31 mph (47.17 km/h) |
| 35 mph (56.33 km/h) | 34.2 mph (55.03 km/h) |
| 40 mph (64.37 km/h) | 39.08 mph (62.9 km/h) |
| 45 mph (72.42 km/h) | 43.97 mph (70.76 km/h) |
| 50 mph (80.47 km/h) | 48.85 mph (78.62 km/h) |
| 55 mph (88.51 km/h) | 53.74 mph (86.48 km/h) |
| 60 mph (96.56 km/h) | 58.62 mph (94.34 km/h) |
| 65 mph (104.61 km/h) | 63.51 mph (102.21 km/h) |
| 70 mph (112.65 km/h) | 68.39 mph (110.07 km/h) |
| 75 mph (120.7 km/h) | 73.28 mph (117.93 km/h) |
| 80 mph (128.75 km/h) | 78.16 mph (125.79 km/h) |
| 85 mph (136.79 km/h) | 83.05 mph (133.66 km/h) |
| 90 mph (144.84 km/h) | 87.93 mph (141.52 km/h) |
| 95 mph (152.89 km/h) | 92.82 mph (149.38 km/h) |
| 100 mph (160.93 km/h) | 97.71 mph (157.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1914 | 2223 | 2394 | 2500 | 2614 | 2696 | 2785 | 2891 | 3038 | 3184 | 3347 | 3477 | 3713 | 3974 | 4178 | 4308 | 4381 | 4650 | 5025 | 5839 |
Better Fuel Economy Factory Ratios Increased Power
