Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/80-18 | 140/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.82 (681.2) | 27.92 (709.2) | 1.1 (28) 4.1% |
| Width inches (mm) | 5.51 (140) | 5.51 (140) | 0 (0) 0% |
| Circum. inches (mm) | 84.25 (2140.05) | 87.72 (2228.02) | 3.46 (87.96) 4.1% |
| Sidewall Height inches (mm) | 4.41 (112) | 4.96 (126) | 0.55 (14) 12.5% |
| Revolutions per mile (km) | 752.01 (467.28) | 722.32 (448.83) | -29.69 (-18.45) -3.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.82 mph (33.51 km/h) |
| 25 mph (40.23 km/h) | 26.03 mph (41.89 km/h) |
| 30 mph (48.28 km/h) | 31.23 mph (50.26 km/h) |
| 35 mph (56.33 km/h) | 36.44 mph (58.64 km/h) |
| 40 mph (64.37 km/h) | 41.64 mph (67.02 km/h) |
| 45 mph (72.42 km/h) | 46.85 mph (75.4 km/h) |
| 50 mph (80.47 km/h) | 52.06 mph (83.77 km/h) |
| 55 mph (88.51 km/h) | 57.26 mph (92.15 km/h) |
| 60 mph (96.56 km/h) | 62.47 mph (100.53 km/h) |
| 65 mph (104.61 km/h) | 67.67 mph (108.91 km/h) |
| 70 mph (112.65 km/h) | 72.88 mph (117.28 km/h) |
| 75 mph (120.7 km/h) | 78.08 mph (125.66 km/h) |
| 80 mph (128.75 km/h) | 83.29 mph (134.04 km/h) |
| 85 mph (136.79 km/h) | 88.49 mph (142.42 km/h) |
| 90 mph (144.84 km/h) | 93.7 mph (150.79 km/h) |
| 95 mph (152.89 km/h) | 98.9 mph (159.17 km/h) |
| 100 mph (160.93 km/h) | 104.11 mph (167.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1838 | 2135 | 2300 | 2401 | 2511 | 2589 | 2675 | 2777 | 2918 | 3058 | 3215 | 3340 | 3567 | 3817 | 4013 | 4138 | 4208 | 4466 | 4826 | 5608 |
Better Fuel Economy Factory Ratios Increased Power
