Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 405/30-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 33.57 (852.6) | 8.49 (215.6) 33.8% |
| Width inches (mm) | 8.46 (215) | 15.94 (405) | 7.48 (190) 88.4% |
| Circum. inches (mm) | 78.79 (2001.19) | 105.45 (2678.52) | 26.67 (677.33) 33.8% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 4.78 (121.5) | 2.24 (57) 88.4% |
| Revolutions per mile (km) | 804.19 (499.7) | 600.83 (373.34) | -203.36 (-126.36) -25.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.77 mph (43.08 km/h) |
| 25 mph (40.23 km/h) | 33.46 mph (53.85 km/h) |
| 30 mph (48.28 km/h) | 40.15 mph (64.62 km/h) |
| 35 mph (56.33 km/h) | 46.85 mph (75.39 km/h) |
| 40 mph (64.37 km/h) | 53.54 mph (86.16 km/h) |
| 45 mph (72.42 km/h) | 60.23 mph (96.93 km/h) |
| 50 mph (80.47 km/h) | 66.92 mph (107.7 km/h) |
| 55 mph (88.51 km/h) | 73.62 mph (118.47 km/h) |
| 60 mph (96.56 km/h) | 80.31 mph (129.24 km/h) |
| 65 mph (104.61 km/h) | 87 mph (140.01 km/h) |
| 70 mph (112.65 km/h) | 93.69 mph (150.78 km/h) |
| 75 mph (120.7 km/h) | 100.38 mph (161.55 km/h) |
| 80 mph (128.75 km/h) | 107.08 mph (172.32 km/h) |
| 85 mph (136.79 km/h) | 113.77 mph (183.09 km/h) |
| 90 mph (144.84 km/h) | 120.46 mph (193.86 km/h) |
| 95 mph (152.89 km/h) | 127.15 mph (204.63 km/h) |
| 100 mph (160.93 km/h) | 133.85 mph (215.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1529 | 1776 | 1913 | 1997 | 2089 | 2154 | 2225 | 2310 | 2427 | 2544 | 2674 | 2778 | 2967 | 3175 | 3338 | 3442 | 3500 | 3715 | 4014 | 4665 |
Better Fuel Economy Factory Ratios Increased Power
