Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 445/40-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 36.52 (927.5) | 8.53 (216.6) 30.5% |
| Width inches (mm) | 13.98 (355) | 17.52 (445) | 3.54 (90) 25.4% |
| Circum. inches (mm) | 87.93 (2233.36) | 114.72 (2913.83) | 26.79 (680.47) 30.5% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 7.01 (178) | 3.51 (89.25) 100.6% |
| Revolutions per mile (km) | 720.59 (447.76) | 552.31 (343.19) | -168.28 (-104.56) -23.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.09 mph (41.99 km/h) |
| 25 mph (40.23 km/h) | 32.62 mph (52.49 km/h) |
| 30 mph (48.28 km/h) | 39.14 mph (62.99 km/h) |
| 35 mph (56.33 km/h) | 45.66 mph (73.49 km/h) |
| 40 mph (64.37 km/h) | 52.19 mph (83.99 km/h) |
| 45 mph (72.42 km/h) | 58.71 mph (94.49 km/h) |
| 50 mph (80.47 km/h) | 65.23 mph (104.98 km/h) |
| 55 mph (88.51 km/h) | 71.76 mph (115.48 km/h) |
| 60 mph (96.56 km/h) | 78.28 mph (125.98 km/h) |
| 65 mph (104.61 km/h) | 84.8 mph (136.48 km/h) |
| 70 mph (112.65 km/h) | 91.33 mph (146.98 km/h) |
| 75 mph (120.7 km/h) | 97.85 mph (157.48 km/h) |
| 80 mph (128.75 km/h) | 104.37 mph (167.98 km/h) |
| 85 mph (136.79 km/h) | 110.9 mph (178.47 km/h) |
| 90 mph (144.84 km/h) | 117.42 mph (188.97 km/h) |
| 95 mph (152.89 km/h) | 123.94 mph (199.47 km/h) |
| 100 mph (160.93 km/h) | 130.47 mph (209.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1406 | 1633 | 1758 | 1836 | 1920 | 1980 | 2045 | 2123 | 2231 | 2339 | 2458 | 2554 | 2727 | 2919 | 3068 | 3164 | 3218 | 3415 | 3690 | 4288 |
Better Fuel Economy Factory Ratios Increased Power
