Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.2) | 32.07 (814.7) | 0.02 (0.5) 0.1% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 100.7 (2557.88) | 100.77 (2559.46) | 0.06 (1.57) 0.1% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 7.04 (178.75) | 0.01 (0.25) 0.1% |
| Revolutions per mile (km) | 629.17 (390.95) | 628.78 (390.71) | -0.39 (-0.24) -0.1% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.01 mph (32.21 km/h) |
| 25 mph (40.23 km/h) | 25.02 mph (40.26 km/h) |
| 30 mph (48.28 km/h) | 30.02 mph (48.31 km/h) |
| 35 mph (56.33 km/h) | 35.02 mph (56.36 km/h) |
| 40 mph (64.37 km/h) | 40.02 mph (64.41 km/h) |
| 45 mph (72.42 km/h) | 45.03 mph (72.47 km/h) |
| 50 mph (80.47 km/h) | 50.03 mph (80.52 km/h) |
| 55 mph (88.51 km/h) | 55.03 mph (88.57 km/h) |
| 60 mph (96.56 km/h) | 60.04 mph (96.62 km/h) |
| 65 mph (104.61 km/h) | 65.04 mph (104.67 km/h) |
| 70 mph (112.65 km/h) | 70.04 mph (112.72 km/h) |
| 75 mph (120.7 km/h) | 75.05 mph (120.78 km/h) |
| 80 mph (128.75 km/h) | 80.05 mph (128.83 km/h) |
| 85 mph (136.79 km/h) | 85.05 mph (136.88 km/h) |
| 90 mph (144.84 km/h) | 90.06 mph (144.93 km/h) |
| 95 mph (152.89 km/h) | 95.06 mph (152.98 km/h) |
| 100 mph (160.93 km/h) | 100.06 mph (161.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1600 | 1859 | 2002 | 2090 | 2186 | 2254 | 2329 | 2417 | 2540 | 2662 | 2799 | 2907 | 3105 | 3323 | 3493 | 3602 | 3663 | 3888 | 4201 | 4882 |
Better Fuel Economy Factory Ratios Increased Power
