Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 335/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 38.46 (977) | -1.57 (-39.8) -3.9% |
| Width inches (mm) | 12.52 (318) | 13.19 (335) | 0.67 (17) 5.3% |
| Circum. inches (mm) | 125.76 (3194.37) | 120.84 (3069.34) | -4.92 (-125.04) -3.9% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 9.23 (234.5) | -0.78 (-19.9) -7.8% |
| Revolutions per mile (km) | 503.81 (313.05) | 524.33 (325.8) | 20.52 (12.75) 4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.22 mph (30.93 km/h) |
| 25 mph (40.23 km/h) | 24.02 mph (38.66 km/h) |
| 30 mph (48.28 km/h) | 28.83 mph (46.39 km/h) |
| 35 mph (56.33 km/h) | 33.63 mph (54.12 km/h) |
| 40 mph (64.37 km/h) | 38.43 mph (61.85 km/h) |
| 45 mph (72.42 km/h) | 43.24 mph (69.59 km/h) |
| 50 mph (80.47 km/h) | 48.04 mph (77.32 km/h) |
| 55 mph (88.51 km/h) | 52.85 mph (85.05 km/h) |
| 60 mph (96.56 km/h) | 57.65 mph (92.78 km/h) |
| 65 mph (104.61 km/h) | 62.46 mph (100.51 km/h) |
| 70 mph (112.65 km/h) | 67.26 mph (108.24 km/h) |
| 75 mph (120.7 km/h) | 72.06 mph (115.98 km/h) |
| 80 mph (128.75 km/h) | 76.87 mph (123.71 km/h) |
| 85 mph (136.79 km/h) | 81.67 mph (131.44 km/h) |
| 90 mph (144.84 km/h) | 86.48 mph (139.17 km/h) |
| 95 mph (152.89 km/h) | 91.28 mph (146.9 km/h) |
| 100 mph (160.93 km/h) | 96.09 mph (154.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1334 | 1550 | 1669 | 1743 | 1823 | 1879 | 1942 | 2016 | 2118 | 2220 | 2334 | 2424 | 2589 | 2771 | 2913 | 3004 | 3055 | 3242 | 3503 | 4071 |
Better Fuel Economy Factory Ratios Increased Power
