Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 225/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 27.09 (688) | 2.01 (51) 8% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 78.79 (2001.19) | 85.1 (2161.42) | 6.31 (160.22) 8% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 3.54 (90) | 1 (25.5) 39.5% |
| Revolutions per mile (km) | 804.19 (499.7) | 744.58 (462.66) | -59.61 (-37.04) -7.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.6 mph (34.76 km/h) |
| 25 mph (40.23 km/h) | 27 mph (43.45 km/h) |
| 30 mph (48.28 km/h) | 32.4 mph (52.15 km/h) |
| 35 mph (56.33 km/h) | 37.8 mph (60.84 km/h) |
| 40 mph (64.37 km/h) | 43.2 mph (69.53 km/h) |
| 45 mph (72.42 km/h) | 48.6 mph (78.22 km/h) |
| 50 mph (80.47 km/h) | 54 mph (86.91 km/h) |
| 55 mph (88.51 km/h) | 59.4 mph (95.6 km/h) |
| 60 mph (96.56 km/h) | 64.8 mph (104.29 km/h) |
| 65 mph (104.61 km/h) | 70.2 mph (112.98 km/h) |
| 70 mph (112.65 km/h) | 75.6 mph (121.67 km/h) |
| 75 mph (120.7 km/h) | 81 mph (130.36 km/h) |
| 80 mph (128.75 km/h) | 86.41 mph (139.06 km/h) |
| 85 mph (136.79 km/h) | 91.81 mph (147.75 km/h) |
| 90 mph (144.84 km/h) | 97.21 mph (156.44 km/h) |
| 95 mph (152.89 km/h) | 102.61 mph (165.13 km/h) |
| 100 mph (160.93 km/h) | 108.01 mph (173.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1895 | 2201 | 2371 | 2475 | 2588 | 2669 | 2758 | 2862 | 3008 | 3153 | 3314 | 3443 | 3677 | 3935 | 4136 | 4265 | 4338 | 4604 | 4975 | 5781 |
Better Fuel Economy Factory Ratios Increased Power
