Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 31.91 (810.5) | -2.12 (-53.74) -6.2% |
| Width inches (mm) | 12.52 (318) | 10.83 (275) | -1.69 (-43) -13.5% |
| Circum. inches (mm) | 106.89 (2715.09) | 100.25 (2546.26) | -6.65 (-168.83) -6.2% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 5.95 (151.25) | -2.06 (-52.27) -25.7% |
| Revolutions per mile (km) | 592.74 (368.31) | 632.04 (392.73) | 39.3 (24.42) 6.6% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.76 mph (30.19 km/h) |
| 25 mph (40.23 km/h) | 23.45 mph (37.73 km/h) |
| 30 mph (48.28 km/h) | 28.13 mph (45.28 km/h) |
| 35 mph (56.33 km/h) | 32.82 mph (52.82 km/h) |
| 40 mph (64.37 km/h) | 37.51 mph (60.37 km/h) |
| 45 mph (72.42 km/h) | 42.2 mph (67.92 km/h) |
| 50 mph (80.47 km/h) | 46.89 mph (75.46 km/h) |
| 55 mph (88.51 km/h) | 51.58 mph (83.01 km/h) |
| 60 mph (96.56 km/h) | 56.27 mph (90.56 km/h) |
| 65 mph (104.61 km/h) | 60.96 mph (98.1 km/h) |
| 70 mph (112.65 km/h) | 65.65 mph (105.65 km/h) |
| 75 mph (120.7 km/h) | 70.34 mph (113.2 km/h) |
| 80 mph (128.75 km/h) | 75.03 mph (120.74 km/h) |
| 85 mph (136.79 km/h) | 79.71 mph (128.29 km/h) |
| 90 mph (144.84 km/h) | 84.4 mph (135.83 km/h) |
| 95 mph (152.89 km/h) | 89.09 mph (143.38 km/h) |
| 100 mph (160.93 km/h) | 93.78 mph (150.93 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
Better Fuel Economy Factory Ratios Increased Power
