Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 405/25-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 31.97 (812.1) | 6.89 (175.1) 27.5% |
| Width inches (mm) | 8.46 (215) | 15.94 (405) | 7.48 (190) 88.4% |
| Circum. inches (mm) | 78.79 (2001.19) | 100.44 (2551.29) | 21.66 (550.09) 27.5% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 3.99 (101.25) | 1.45 (36.75) 57% |
| Revolutions per mile (km) | 804.19 (499.7) | 630.8 (391.96) | -173.39 (-107.74) -21.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.5 mph (41.03 km/h) |
| 25 mph (40.23 km/h) | 31.87 mph (51.29 km/h) |
| 30 mph (48.28 km/h) | 38.25 mph (61.55 km/h) |
| 35 mph (56.33 km/h) | 44.62 mph (71.81 km/h) |
| 40 mph (64.37 km/h) | 51 mph (82.07 km/h) |
| 45 mph (72.42 km/h) | 57.37 mph (92.33 km/h) |
| 50 mph (80.47 km/h) | 63.74 mph (102.59 km/h) |
| 55 mph (88.51 km/h) | 70.12 mph (112.85 km/h) |
| 60 mph (96.56 km/h) | 76.49 mph (123.1 km/h) |
| 65 mph (104.61 km/h) | 82.87 mph (133.36 km/h) |
| 70 mph (112.65 km/h) | 89.24 mph (143.62 km/h) |
| 75 mph (120.7 km/h) | 95.62 mph (153.88 km/h) |
| 80 mph (128.75 km/h) | 101.99 mph (164.14 km/h) |
| 85 mph (136.79 km/h) | 108.36 mph (174.4 km/h) |
| 90 mph (144.84 km/h) | 114.74 mph (184.66 km/h) |
| 95 mph (152.89 km/h) | 121.11 mph (194.91 km/h) |
| 100 mph (160.93 km/h) | 127.49 mph (205.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1605 | 1865 | 2008 | 2097 | 2193 | 2261 | 2336 | 2425 | 2548 | 2671 | 2807 | 2917 | 3115 | 3333 | 3504 | 3614 | 3675 | 3900 | 4215 | 4898 |
Better Fuel Economy Factory Ratios Increased Power
