Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 335/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 39.78 (1010.5) | -0.25 (-6.3) -0.6% |
| Width inches (mm) | 12.52 (318) | 13.19 (335) | 0.67 (17) 5.3% |
| Circum. inches (mm) | 125.76 (3194.37) | 124.98 (3174.58) | -0.78 (-19.79) -0.6% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 9.89 (251.25) | -0.12 (-3.15) -1.2% |
| Revolutions per mile (km) | 503.81 (313.05) | 506.95 (315) | 3.14 (1.95) 0.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.88 mph (31.99 km/h) |
| 25 mph (40.23 km/h) | 24.85 mph (39.98 km/h) |
| 30 mph (48.28 km/h) | 29.81 mph (47.98 km/h) |
| 35 mph (56.33 km/h) | 34.78 mph (55.98 km/h) |
| 40 mph (64.37 km/h) | 39.75 mph (63.98 km/h) |
| 45 mph (72.42 km/h) | 44.72 mph (71.97 km/h) |
| 50 mph (80.47 km/h) | 49.69 mph (79.97 km/h) |
| 55 mph (88.51 km/h) | 54.66 mph (87.97 km/h) |
| 60 mph (96.56 km/h) | 59.63 mph (95.96 km/h) |
| 65 mph (104.61 km/h) | 64.6 mph (103.96 km/h) |
| 70 mph (112.65 km/h) | 69.57 mph (111.96 km/h) |
| 75 mph (120.7 km/h) | 74.54 mph (119.95 km/h) |
| 80 mph (128.75 km/h) | 79.5 mph (127.95 km/h) |
| 85 mph (136.79 km/h) | 84.47 mph (135.95 km/h) |
| 90 mph (144.84 km/h) | 89.44 mph (143.94 km/h) |
| 95 mph (152.89 km/h) | 94.41 mph (151.94 km/h) |
| 100 mph (160.93 km/h) | 99.38 mph (159.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1290 | 1499 | 1614 | 1685 | 1762 | 1817 | 1877 | 1949 | 2048 | 2146 | 2256 | 2344 | 2503 | 2679 | 2816 | 2904 | 2953 | 3135 | 3387 | 3936 |
Better Fuel Economy Factory Ratios Increased Power
