Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 40/12.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 40.04 (1016.92) | 0 (0.12) 0% |
| Width inches (mm) | 12.52 (318) | 12.52 (318) | 0 (0) 0% |
| Circum. inches (mm) | 125.76 (3194.37) | 125.78 (3194.75) | 0.01 (0.38) 0% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 11.52 (292.56) | 1.5 (38.16) 15% |
| Revolutions per mile (km) | 503.81 (313.05) | 503.75 (313.01) | -0.06 (-0.04) -0% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20 mph (32.19 km/h) |
| 25 mph (40.23 km/h) | 25 mph (40.24 km/h) |
| 30 mph (48.28 km/h) | 30 mph (48.29 km/h) |
| 35 mph (56.33 km/h) | 35 mph (56.33 km/h) |
| 40 mph (64.37 km/h) | 40 mph (64.38 km/h) |
| 45 mph (72.42 km/h) | 45.01 mph (72.43 km/h) |
| 50 mph (80.47 km/h) | 50.01 mph (80.48 km/h) |
| 55 mph (88.51 km/h) | 55.01 mph (88.52 km/h) |
| 60 mph (96.56 km/h) | 60.01 mph (96.57 km/h) |
| 65 mph (104.61 km/h) | 65.01 mph (104.62 km/h) |
| 70 mph (112.65 km/h) | 70.01 mph (112.67 km/h) |
| 75 mph (120.7 km/h) | 75.01 mph (120.72 km/h) |
| 80 mph (128.75 km/h) | 80.01 mph (128.76 km/h) |
| 85 mph (136.79 km/h) | 85.01 mph (136.81 km/h) |
| 90 mph (144.84 km/h) | 90.01 mph (144.86 km/h) |
| 95 mph (152.89 km/h) | 95.01 mph (152.91 km/h) |
| 100 mph (160.93 km/h) | 100.01 mph (160.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1282 | 1489 | 1604 | 1675 | 1751 | 1806 | 1866 | 1937 | 2035 | 2133 | 2242 | 2329 | 2488 | 2662 | 2798 | 2886 | 2935 | 3115 | 3366 | 3911 |
Better Fuel Economy Factory Ratios Increased Power
