Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/70-18 | 275/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.88 (835.2) | 34.24 (869.7) | 1.36 (34.5) 4.1% |
| Width inches (mm) | 10.63 (270) | 10.83 (275) | 0.2 (5) 1.9% |
| Circum. inches (mm) | 103.3 (2623.86) | 107.57 (2732.24) | 4.27 (108.38) 4.1% |
| Sidewall Height inches (mm) | 7.44 (189) | 8.12 (206.25) | 0.68 (17.25) 9.1% |
| Revolutions per mile (km) | 613.35 (381.12) | 589.02 (366) | -24.33 (-15.12) -4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.83 mph (33.52 km/h) |
| 25 mph (40.23 km/h) | 26.03 mph (41.9 km/h) |
| 30 mph (48.28 km/h) | 31.24 mph (50.27 km/h) |
| 35 mph (56.33 km/h) | 36.45 mph (58.65 km/h) |
| 40 mph (64.37 km/h) | 41.65 mph (67.03 km/h) |
| 45 mph (72.42 km/h) | 46.86 mph (75.41 km/h) |
| 50 mph (80.47 km/h) | 52.07 mph (83.79 km/h) |
| 55 mph (88.51 km/h) | 57.27 mph (92.17 km/h) |
| 60 mph (96.56 km/h) | 62.48 mph (100.55 km/h) |
| 65 mph (104.61 km/h) | 67.68 mph (108.93 km/h) |
| 70 mph (112.65 km/h) | 72.89 mph (117.31 km/h) |
| 75 mph (120.7 km/h) | 78.1 mph (125.69 km/h) |
| 80 mph (128.75 km/h) | 83.3 mph (134.07 km/h) |
| 85 mph (136.79 km/h) | 88.51 mph (142.45 km/h) |
| 90 mph (144.84 km/h) | 93.72 mph (150.82 km/h) |
| 95 mph (152.89 km/h) | 98.92 mph (159.2 km/h) |
| 100 mph (160.93 km/h) | 104.13 mph (167.58 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
