Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 40/12.5-20 | 35/11.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 40.03 (1016.8) | 34.93 (887.32) | -5.1 (-129.48) -12.7% |
| Width inches (mm) | 12.52 (318) | 11.5 (292) | -1.02 (-26) -8.2% |
| Circum. inches (mm) | 125.76 (3194.37) | 109.75 (2787.6) | -16.01 (-406.77) -12.7% |
| Sidewall Height inches (mm) | 10.02 (254.4) | 8.97 (227.76) | -1.05 (-26.64) -10.5% |
| Revolutions per mile (km) | 503.81 (313.05) | 577.32 (358.73) | 73.52 (45.68) 14.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.45 mph (28.09 km/h) |
| 25 mph (40.23 km/h) | 21.82 mph (35.11 km/h) |
| 30 mph (48.28 km/h) | 26.18 mph (42.13 km/h) |
| 35 mph (56.33 km/h) | 30.54 mph (49.15 km/h) |
| 40 mph (64.37 km/h) | 34.91 mph (56.18 km/h) |
| 45 mph (72.42 km/h) | 39.27 mph (63.2 km/h) |
| 50 mph (80.47 km/h) | 43.63 mph (70.22 km/h) |
| 55 mph (88.51 km/h) | 48 mph (77.24 km/h) |
| 60 mph (96.56 km/h) | 52.36 mph (84.26 km/h) |
| 65 mph (104.61 km/h) | 56.72 mph (91.29 km/h) |
| 70 mph (112.65 km/h) | 61.09 mph (98.31 km/h) |
| 75 mph (120.7 km/h) | 65.45 mph (105.33 km/h) |
| 80 mph (128.75 km/h) | 69.81 mph (112.35 km/h) |
| 85 mph (136.79 km/h) | 74.18 mph (119.37 km/h) |
| 90 mph (144.84 km/h) | 78.54 mph (126.4 km/h) |
| 95 mph (152.89 km/h) | 82.9 mph (133.42 km/h) |
| 100 mph (160.93 km/h) | 87.27 mph (140.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1469 | 1707 | 1838 | 1919 | 2007 | 2069 | 2138 | 2219 | 2332 | 2444 | 2569 | 2670 | 2851 | 3051 | 3207 | 3307 | 3363 | 3570 | 3857 | 4483 |
Better Fuel Economy Factory Ratios Increased Power
