Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-20 | 225/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (696) | 27.09 (688) | -0.31 (-8) -1.1% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 86.08 (2186.55) | 85.1 (2161.42) | -0.99 (-25.13) -1.1% |
| Sidewall Height inches (mm) | 3.7 (94) | 3.54 (90) | -0.16 (-4) -4.3% |
| Revolutions per mile (km) | 736.02 (457.34) | 744.58 (462.66) | 8.56 (5.32) 1.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.82 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.77 km/h) |
| 30 mph (48.28 km/h) | 29.66 mph (47.73 km/h) |
| 35 mph (56.33 km/h) | 34.6 mph (55.68 km/h) |
| 40 mph (64.37 km/h) | 39.54 mph (63.63 km/h) |
| 45 mph (72.42 km/h) | 44.48 mph (71.59 km/h) |
| 50 mph (80.47 km/h) | 49.43 mph (79.54 km/h) |
| 55 mph (88.51 km/h) | 54.37 mph (87.5 km/h) |
| 60 mph (96.56 km/h) | 59.31 mph (95.45 km/h) |
| 65 mph (104.61 km/h) | 64.25 mph (103.41 km/h) |
| 70 mph (112.65 km/h) | 69.2 mph (111.36 km/h) |
| 75 mph (120.7 km/h) | 74.14 mph (119.31 km/h) |
| 80 mph (128.75 km/h) | 79.08 mph (127.27 km/h) |
| 85 mph (136.79 km/h) | 84.02 mph (135.22 km/h) |
| 90 mph (144.84 km/h) | 88.97 mph (143.18 km/h) |
| 95 mph (152.89 km/h) | 93.91 mph (151.13 km/h) |
| 100 mph (160.93 km/h) | 98.85 mph (159.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1895 | 2201 | 2371 | 2475 | 2588 | 2669 | 2758 | 2862 | 3008 | 3153 | 3314 | 3443 | 3677 | 3935 | 4136 | 4265 | 4338 | 4604 | 4975 | 5781 |
Better Fuel Economy Factory Ratios Increased Power
