Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 31/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 31.02 (787.84) | 5.6 (142.34) 22.1% |
| Width inches (mm) | 10.83 (275) | 12.52 (318) | 1.69 (43) 15.6% |
| Circum. inches (mm) | 79.84 (2027.9) | 97.44 (2475.07) | 17.61 (447.17) 22.1% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 5.51 (139.92) | 2.8 (71.17) 103.5% |
| Revolutions per mile (km) | 793.6 (493.12) | 650.22 (404.03) | -143.38 (-89.09) -18.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.41 mph (39.28 km/h) |
| 25 mph (40.23 km/h) | 30.51 mph (49.11 km/h) |
| 30 mph (48.28 km/h) | 36.62 mph (58.93 km/h) |
| 35 mph (56.33 km/h) | 42.72 mph (68.75 km/h) |
| 40 mph (64.37 km/h) | 48.82 mph (78.57 km/h) |
| 45 mph (72.42 km/h) | 54.92 mph (88.39 km/h) |
| 50 mph (80.47 km/h) | 61.03 mph (98.21 km/h) |
| 55 mph (88.51 km/h) | 67.13 mph (108.03 km/h) |
| 60 mph (96.56 km/h) | 73.23 mph (117.85 km/h) |
| 65 mph (104.61 km/h) | 79.33 mph (127.67 km/h) |
| 70 mph (112.65 km/h) | 85.44 mph (137.5 km/h) |
| 75 mph (120.7 km/h) | 91.54 mph (147.32 km/h) |
| 80 mph (128.75 km/h) | 97.64 mph (157.14 km/h) |
| 85 mph (136.79 km/h) | 103.74 mph (166.96 km/h) |
| 90 mph (144.84 km/h) | 109.85 mph (176.78 km/h) |
| 95 mph (152.89 km/h) | 115.95 mph (186.6 km/h) |
| 100 mph (160.93 km/h) | 122.05 mph (196.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1655 | 1922 | 2070 | 2162 | 2260 | 2331 | 2408 | 2500 | 2626 | 2753 | 2894 | 3007 | 3211 | 3436 | 3612 | 3725 | 3788 | 4021 | 4344 | 5049 |
Better Fuel Economy Factory Ratios Increased Power
