Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/80-18 | 275/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.01 (889.2) | 34.24 (869.7) | -0.77 (-19.5) -2.2% |
| Width inches (mm) | 10.63 (270) | 10.83 (275) | 0.2 (5) 1.9% |
| Circum. inches (mm) | 109.98 (2793.5) | 107.57 (2732.24) | -2.41 (-61.26) -2.2% |
| Sidewall Height inches (mm) | 8.5 (216) | 8.12 (206.25) | -0.38 (-9.75) -4.5% |
| Revolutions per mile (km) | 576.1 (357.97) | 589.02 (366) | 12.92 (8.03) 2.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.56 mph (31.48 km/h) |
| 25 mph (40.23 km/h) | 24.45 mph (39.35 km/h) |
| 30 mph (48.28 km/h) | 29.34 mph (47.22 km/h) |
| 35 mph (56.33 km/h) | 34.23 mph (55.09 km/h) |
| 40 mph (64.37 km/h) | 39.12 mph (62.96 km/h) |
| 45 mph (72.42 km/h) | 44.01 mph (70.83 km/h) |
| 50 mph (80.47 km/h) | 48.9 mph (78.7 km/h) |
| 55 mph (88.51 km/h) | 53.79 mph (86.57 km/h) |
| 60 mph (96.56 km/h) | 58.68 mph (94.44 km/h) |
| 65 mph (104.61 km/h) | 63.57 mph (102.31 km/h) |
| 70 mph (112.65 km/h) | 68.46 mph (110.18 km/h) |
| 75 mph (120.7 km/h) | 73.36 mph (118.05 km/h) |
| 80 mph (128.75 km/h) | 78.25 mph (125.92 km/h) |
| 85 mph (136.79 km/h) | 83.14 mph (133.79 km/h) |
| 90 mph (144.84 km/h) | 88.03 mph (141.66 km/h) |
| 95 mph (152.89 km/h) | 92.92 mph (149.54 km/h) |
| 100 mph (160.93 km/h) | 97.81 mph (157.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1499 | 1741 | 1875 | 1958 | 2047 | 2111 | 2181 | 2264 | 2379 | 2494 | 2622 | 2724 | 2909 | 3113 | 3272 | 3374 | 3432 | 3642 | 3936 | 4573 |
Better Fuel Economy Factory Ratios Increased Power
