Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 395/85-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 48.94 (1243) | 8.91 (226.2) 22.2% |
| Width inches (mm) | 12.52 (318) | 15.55 (395) | 3.03 (77) 24.2% |
| Circum. inches (mm) | 125.76 (3194.37) | 153.74 (3905) | 27.98 (710.63) 22.2% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 13.22 (335.75) | 3.2 (81.35) 32% |
| Revolutions per mile (km) | 503.81 (313.05) | 412.12 (256.08) | -91.68 (-56.97) -18.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.45 mph (39.35 km/h) |
| 25 mph (40.23 km/h) | 30.56 mph (49.18 km/h) |
| 30 mph (48.28 km/h) | 36.67 mph (59.02 km/h) |
| 35 mph (56.33 km/h) | 42.79 mph (68.86 km/h) |
| 40 mph (64.37 km/h) | 48.9 mph (78.69 km/h) |
| 45 mph (72.42 km/h) | 55.01 mph (88.53 km/h) |
| 50 mph (80.47 km/h) | 61.12 mph (98.37 km/h) |
| 55 mph (88.51 km/h) | 67.24 mph (108.21 km/h) |
| 60 mph (96.56 km/h) | 73.35 mph (118.04 km/h) |
| 65 mph (104.61 km/h) | 79.46 mph (127.88 km/h) |
| 70 mph (112.65 km/h) | 85.57 mph (137.72 km/h) |
| 75 mph (120.7 km/h) | 91.68 mph (147.55 km/h) |
| 80 mph (128.75 km/h) | 97.8 mph (157.39 km/h) |
| 85 mph (136.79 km/h) | 103.91 mph (167.23 km/h) |
| 90 mph (144.84 km/h) | 110.02 mph (177.06 km/h) |
| 95 mph (152.89 km/h) | 116.13 mph (186.9 km/h) |
| 100 mph (160.93 km/h) | 122.25 mph (196.74 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
