Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 33/12.5-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.02 (838.8) | 33.16 (842.2) | 0.13 (3.4) 0.4% |
| Width inches (mm) | 12.52 (318) | 10.83 (275) | -1.69 (-43) -13.5% |
| Circum. inches (mm) | 103.75 (2635.17) | 104.17 (2645.85) | 0.42 (10.68) 0.4% |
| Sidewall Height inches (mm) | 7.51 (190.8) | 7.58 (192.5) | 0.07 (1.7) 0.9% |
| Revolutions per mile (km) | 610.72 (379.48) | 608.25 (377.95) | -2.47 (-1.53) -0.4% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.08 mph (32.32 km/h) |
| 25 mph (40.23 km/h) | 25.1 mph (40.4 km/h) |
| 30 mph (48.28 km/h) | 30.12 mph (48.48 km/h) |
| 35 mph (56.33 km/h) | 35.14 mph (56.56 km/h) |
| 40 mph (64.37 km/h) | 40.16 mph (64.63 km/h) |
| 45 mph (72.42 km/h) | 45.18 mph (72.71 km/h) |
| 50 mph (80.47 km/h) | 50.2 mph (80.79 km/h) |
| 55 mph (88.51 km/h) | 55.22 mph (88.87 km/h) |
| 60 mph (96.56 km/h) | 60.24 mph (96.95 km/h) |
| 65 mph (104.61 km/h) | 65.26 mph (105.03 km/h) |
| 70 mph (112.65 km/h) | 70.28 mph (113.11 km/h) |
| 75 mph (120.7 km/h) | 75.3 mph (121.19 km/h) |
| 80 mph (128.75 km/h) | 80.32 mph (129.27 km/h) |
| 85 mph (136.79 km/h) | 85.34 mph (137.35 km/h) |
| 90 mph (144.84 km/h) | 90.36 mph (145.43 km/h) |
| 95 mph (152.89 km/h) | 95.39 mph (153.51 km/h) |
| 100 mph (160.93 km/h) | 100.41 mph (161.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
Better Fuel Economy Factory Ratios Increased Power
