Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 120/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 25.56 (649.2) | 0.94 (24) 3.8% |
| Width inches (mm) | 5.51 (140) | 4.72 (120) | -0.79 (-20) -14.3% |
| Circum. inches (mm) | 77.33 (1964.12) | 80.3 (2039.52) | 2.97 (75.4) 3.8% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.78 (96) | 0.47 (12) 14.3% |
| Revolutions per mile (km) | 819.37 (509.13) | 789.08 (490.31) | -30.29 (-18.82) -3.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.42 km/h) |
| 25 mph (40.23 km/h) | 25.96 mph (41.78 km/h) |
| 30 mph (48.28 km/h) | 31.15 mph (50.13 km/h) |
| 35 mph (56.33 km/h) | 36.34 mph (58.49 km/h) |
| 40 mph (64.37 km/h) | 41.54 mph (66.85 km/h) |
| 45 mph (72.42 km/h) | 46.73 mph (75.2 km/h) |
| 50 mph (80.47 km/h) | 51.92 mph (83.56 km/h) |
| 55 mph (88.51 km/h) | 57.11 mph (91.91 km/h) |
| 60 mph (96.56 km/h) | 62.3 mph (100.27 km/h) |
| 65 mph (104.61 km/h) | 67.5 mph (108.62 km/h) |
| 70 mph (112.65 km/h) | 72.69 mph (116.98 km/h) |
| 75 mph (120.7 km/h) | 77.88 mph (125.33 km/h) |
| 80 mph (128.75 km/h) | 83.07 mph (133.69 km/h) |
| 85 mph (136.79 km/h) | 88.26 mph (142.05 km/h) |
| 90 mph (144.84 km/h) | 93.45 mph (150.4 km/h) |
| 95 mph (152.89 km/h) | 98.65 mph (158.76 km/h) |
| 100 mph (160.93 km/h) | 103.84 mph (167.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 | 2333 | 2512 | 2623 | 2743 | 2828 | 2922 | 3033 | 3187 | 3341 | 3512 | 3649 | 3896 | 4170 | 4384 | 4520 | 4597 | 4879 | 5272 | 6127 |
Better Fuel Economy Factory Ratios Increased Power
