Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 335/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 41.1 (1044) | 1.07 (27.2) 2.7% |
| Width inches (mm) | 12.52 (318) | 13.19 (335) | 0.67 (17) 5.3% |
| Circum. inches (mm) | 125.76 (3194.37) | 129.13 (3279.82) | 3.36 (85.45) 2.7% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 10.55 (268) | 0.54 (13.6) 5.3% |
| Revolutions per mile (km) | 503.81 (313.05) | 490.68 (304.89) | -13.13 (-8.16) -2.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.54 mph (33.05 km/h) |
| 25 mph (40.23 km/h) | 25.67 mph (41.31 km/h) |
| 30 mph (48.28 km/h) | 30.8 mph (49.57 km/h) |
| 35 mph (56.33 km/h) | 35.94 mph (57.83 km/h) |
| 40 mph (64.37 km/h) | 41.07 mph (66.1 km/h) |
| 45 mph (72.42 km/h) | 46.2 mph (74.36 km/h) |
| 50 mph (80.47 km/h) | 51.34 mph (82.62 km/h) |
| 55 mph (88.51 km/h) | 56.47 mph (90.88 km/h) |
| 60 mph (96.56 km/h) | 61.61 mph (99.14 km/h) |
| 65 mph (104.61 km/h) | 66.74 mph (107.41 km/h) |
| 70 mph (112.65 km/h) | 71.87 mph (115.67 km/h) |
| 75 mph (120.7 km/h) | 77.01 mph (123.93 km/h) |
| 80 mph (128.75 km/h) | 82.14 mph (132.19 km/h) |
| 85 mph (136.79 km/h) | 87.27 mph (140.45 km/h) |
| 90 mph (144.84 km/h) | 92.41 mph (148.72 km/h) |
| 95 mph (152.89 km/h) | 97.54 mph (156.98 km/h) |
| 100 mph (160.93 km/h) | 102.68 mph (165.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1249 | 1451 | 1562 | 1631 | 1706 | 1759 | 1817 | 1886 | 1982 | 2078 | 2184 | 2269 | 2423 | 2593 | 2726 | 2811 | 2859 | 3034 | 3278 | 3810 |
Better Fuel Economy Factory Ratios Increased Power
