Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/65-16 | 205/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.54 (724.9) | 26.46 (672) | -2.08 (-52.9) -7.3% |
| Width inches (mm) | 9.65 (245) | 8.07 (205) | -1.57 (-40) -16.3% |
| Circum. inches (mm) | 89.66 (2277.34) | 83.12 (2111.15) | -6.54 (-166.19) -7.3% |
| Sidewall Height inches (mm) | 6.27 (159.25) | 3.23 (82) | -3.04 (-77.25) -48.5% |
| Revolutions per mile (km) | 706.68 (439.11) | 762.31 (473.67) | 55.63 (34.57) 7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.54 mph (29.84 km/h) |
| 25 mph (40.23 km/h) | 23.18 mph (37.3 km/h) |
| 30 mph (48.28 km/h) | 27.81 mph (44.76 km/h) |
| 35 mph (56.33 km/h) | 32.45 mph (52.22 km/h) |
| 40 mph (64.37 km/h) | 37.08 mph (59.68 km/h) |
| 45 mph (72.42 km/h) | 41.72 mph (67.14 km/h) |
| 50 mph (80.47 km/h) | 46.35 mph (74.6 km/h) |
| 55 mph (88.51 km/h) | 50.99 mph (82.05 km/h) |
| 60 mph (96.56 km/h) | 55.62 mph (89.51 km/h) |
| 65 mph (104.61 km/h) | 60.26 mph (96.97 km/h) |
| 70 mph (112.65 km/h) | 64.89 mph (104.43 km/h) |
| 75 mph (120.7 km/h) | 69.53 mph (111.89 km/h) |
| 80 mph (128.75 km/h) | 74.16 mph (119.35 km/h) |
| 85 mph (136.79 km/h) | 78.8 mph (126.81 km/h) |
| 90 mph (144.84 km/h) | 83.43 mph (134.27 km/h) |
| 95 mph (152.89 km/h) | 88.07 mph (141.73 km/h) |
| 100 mph (160.93 km/h) | 92.7 mph (149.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1940 | 2254 | 2427 | 2534 | 2650 | 2732 | 2823 | 2931 | 3079 | 3228 | 3393 | 3525 | 3764 | 4028 | 4235 | 4367 | 4441 | 4714 | 5093 | 5919 |
Better Fuel Economy Factory Ratios Increased Power
