Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 310/35-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 26.54 (674.2) | 1.93 (49) 7.8% |
| Width inches (mm) | 5.51 (140) | 12.2 (310) | 6.69 (170) 121.4% |
| Circum. inches (mm) | 77.33 (1964.12) | 83.39 (2118.06) | 6.06 (153.94) 7.8% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.27 (108.5) | 0.96 (24.5) 29.2% |
| Revolutions per mile (km) | 819.37 (509.13) | 759.82 (472.13) | -59.55 (-37) -7.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.57 mph (34.71 km/h) |
| 25 mph (40.23 km/h) | 26.96 mph (43.39 km/h) |
| 30 mph (48.28 km/h) | 32.35 mph (52.06 km/h) |
| 35 mph (56.33 km/h) | 37.74 mph (60.74 km/h) |
| 40 mph (64.37 km/h) | 43.13 mph (69.42 km/h) |
| 45 mph (72.42 km/h) | 48.53 mph (78.1 km/h) |
| 50 mph (80.47 km/h) | 53.92 mph (86.77 km/h) |
| 55 mph (88.51 km/h) | 59.31 mph (95.45 km/h) |
| 60 mph (96.56 km/h) | 64.7 mph (104.13 km/h) |
| 65 mph (104.61 km/h) | 70.09 mph (112.81 km/h) |
| 70 mph (112.65 km/h) | 75.49 mph (121.48 km/h) |
| 75 mph (120.7 km/h) | 80.88 mph (130.16 km/h) |
| 80 mph (128.75 km/h) | 86.27 mph (138.84 km/h) |
| 85 mph (136.79 km/h) | 91.66 mph (147.52 km/h) |
| 90 mph (144.84 km/h) | 97.05 mph (156.19 km/h) |
| 95 mph (152.89 km/h) | 102.45 mph (164.87 km/h) |
| 100 mph (160.93 km/h) | 107.84 mph (173.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1934 | 2246 | 2419 | 2526 | 2641 | 2723 | 2814 | 2921 | 3069 | 3217 | 3382 | 3513 | 3752 | 4015 | 4221 | 4353 | 4427 | 4698 | 5077 | 5900 |
Better Fuel Economy Factory Ratios Increased Power
