Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/75-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.94 (862.2) | 33.16 (842.2) | -0.79 (-20) -2.3% |
| Width inches (mm) | 10.63 (270) | 10.83 (275) | 0.2 (5) 1.9% |
| Circum. inches (mm) | 106.64 (2708.68) | 104.17 (2645.85) | -2.47 (-62.83) -2.3% |
| Sidewall Height inches (mm) | 7.97 (202.5) | 7.58 (192.5) | -0.39 (-10) -4.9% |
| Revolutions per mile (km) | 594.14 (369.18) | 608.25 (377.95) | 14.11 (8.77) 2.4% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.54 mph (31.44 km/h) |
| 25 mph (40.23 km/h) | 24.42 mph (39.3 km/h) |
| 30 mph (48.28 km/h) | 29.3 mph (47.16 km/h) |
| 35 mph (56.33 km/h) | 34.19 mph (55.02 km/h) |
| 40 mph (64.37 km/h) | 39.07 mph (62.88 km/h) |
| 45 mph (72.42 km/h) | 43.96 mph (70.74 km/h) |
| 50 mph (80.47 km/h) | 48.84 mph (78.6 km/h) |
| 55 mph (88.51 km/h) | 53.72 mph (86.46 km/h) |
| 60 mph (96.56 km/h) | 58.61 mph (94.32 km/h) |
| 65 mph (104.61 km/h) | 63.49 mph (102.18 km/h) |
| 70 mph (112.65 km/h) | 68.38 mph (110.04 km/h) |
| 75 mph (120.7 km/h) | 73.26 mph (117.9 km/h) |
| 80 mph (128.75 km/h) | 78.14 mph (125.76 km/h) |
| 85 mph (136.79 km/h) | 83.03 mph (133.62 km/h) |
| 90 mph (144.84 km/h) | 87.91 mph (141.48 km/h) |
| 95 mph (152.89 km/h) | 92.8 mph (149.34 km/h) |
| 100 mph (160.93 km/h) | 97.68 mph (157.2 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
