Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-10 | 425/85-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.13 (486) | 49.44 (1255.9) | 30.31 (769.9) 158.4% |
| Width inches (mm) | 5.71 (145) | 16.73 (425) | 11.02 (280) 193.1% |
| Circum. inches (mm) | 60.11 (1526.81) | 155.34 (3945.53) | 95.22 (2418.71) 158.4% |
| Sidewall Height inches (mm) | 4.57 (116) | 14.22 (361.25) | 9.66 (245.25) 211.4% |
| Revolutions per mile (km) | 1054.05 (654.96) | 407.89 (253.45) | -646.16 (-401.51) -61.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 51.68 mph (83.18 km/h) |
| 25 mph (40.23 km/h) | 64.6 mph (103.97 km/h) |
| 30 mph (48.28 km/h) | 77.52 mph (124.76 km/h) |
| 35 mph (56.33 km/h) | 90.45 mph (145.56 km/h) |
| 40 mph (64.37 km/h) | 103.37 mph (166.35 km/h) |
| 45 mph (72.42 km/h) | 116.29 mph (187.15 km/h) |
| 50 mph (80.47 km/h) | 129.21 mph (207.94 km/h) |
| 55 mph (88.51 km/h) | 142.13 mph (228.73 km/h) |
| 60 mph (96.56 km/h) | 155.05 mph (249.53 km/h) |
| 65 mph (104.61 km/h) | 167.97 mph (270.32 km/h) |
| 70 mph (112.65 km/h) | 180.89 mph (291.12 km/h) |
| 75 mph (120.7 km/h) | 193.81 mph (311.91 km/h) |
| 80 mph (128.75 km/h) | 206.73 mph (332.7 km/h) |
| 85 mph (136.79 km/h) | 219.65 mph (353.5 km/h) |
| 90 mph (144.84 km/h) | 232.57 mph (374.29 km/h) |
| 95 mph (152.89 km/h) | 245.49 mph (395.09 km/h) |
| 100 mph (160.93 km/h) | 258.42 mph (415.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
