Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 320/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 38.9 (988) | 13.48 (342.5) 53.1% |
| Width inches (mm) | 10.83 (275) | 12.6 (320) | 1.77 (45) 16.4% |
| Circum. inches (mm) | 79.84 (2027.9) | 122.2 (3103.89) | 42.36 (1076) 53.1% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 9.45 (240) | 6.74 (171.25) 249.1% |
| Revolutions per mile (km) | 793.6 (493.12) | 518.49 (322.18) | -275.11 (-170.95) -34.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.61 mph (49.27 km/h) |
| 25 mph (40.23 km/h) | 38.26 mph (61.58 km/h) |
| 30 mph (48.28 km/h) | 45.92 mph (73.9 km/h) |
| 35 mph (56.33 km/h) | 53.57 mph (86.21 km/h) |
| 40 mph (64.37 km/h) | 61.22 mph (98.53 km/h) |
| 45 mph (72.42 km/h) | 68.88 mph (110.85 km/h) |
| 50 mph (80.47 km/h) | 76.53 mph (123.16 km/h) |
| 55 mph (88.51 km/h) | 84.18 mph (135.48 km/h) |
| 60 mph (96.56 km/h) | 91.84 mph (147.8 km/h) |
| 65 mph (104.61 km/h) | 99.49 mph (160.11 km/h) |
| 70 mph (112.65 km/h) | 107.14 mph (172.43 km/h) |
| 75 mph (120.7 km/h) | 114.79 mph (184.74 km/h) |
| 80 mph (128.75 km/h) | 122.45 mph (197.06 km/h) |
| 85 mph (136.79 km/h) | 130.1 mph (209.38 km/h) |
| 90 mph (144.84 km/h) | 137.75 mph (221.69 km/h) |
| 95 mph (152.89 km/h) | 145.41 mph (234.01 km/h) |
| 100 mph (160.93 km/h) | 153.06 mph (246.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1319 | 1533 | 1651 | 1724 | 1802 | 1858 | 1920 | 1993 | 2094 | 2195 | 2308 | 2397 | 2560 | 2740 | 2880 | 2970 | 3021 | 3206 | 3464 | 4026 |
Better Fuel Economy Factory Ratios Increased Power
