Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 275/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 34.24 (869.7) | 0.21 (5.46) 0.6% |
| Width inches (mm) | 12.52 (318) | 10.83 (275) | -1.69 (-43) -13.5% |
| Circum. inches (mm) | 106.89 (2715.09) | 107.57 (2732.24) | 0.68 (17.15) 0.6% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 8.12 (206.25) | 0.11 (2.73) 1.3% |
| Revolutions per mile (km) | 592.74 (368.31) | 589.02 (366) | -3.72 (-2.31) -0.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.13 mph (32.39 km/h) |
| 25 mph (40.23 km/h) | 25.16 mph (40.49 km/h) |
| 30 mph (48.28 km/h) | 30.19 mph (48.59 km/h) |
| 35 mph (56.33 km/h) | 35.22 mph (56.68 km/h) |
| 40 mph (64.37 km/h) | 40.25 mph (64.78 km/h) |
| 45 mph (72.42 km/h) | 45.28 mph (72.88 km/h) |
| 50 mph (80.47 km/h) | 50.32 mph (80.98 km/h) |
| 55 mph (88.51 km/h) | 55.35 mph (89.07 km/h) |
| 60 mph (96.56 km/h) | 60.38 mph (97.17 km/h) |
| 65 mph (104.61 km/h) | 65.41 mph (105.27 km/h) |
| 70 mph (112.65 km/h) | 70.44 mph (113.37 km/h) |
| 75 mph (120.7 km/h) | 75.47 mph (121.46 km/h) |
| 80 mph (128.75 km/h) | 80.51 mph (129.56 km/h) |
| 85 mph (136.79 km/h) | 85.54 mph (137.66 km/h) |
| 90 mph (144.84 km/h) | 90.57 mph (145.76 km/h) |
| 95 mph (152.89 km/h) | 95.6 mph (153.85 km/h) |
| 100 mph (160.93 km/h) | 100.63 mph (161.95 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
