Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-20 | 245/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.18 (766.5) | 30.61 (777.5) | 0.43 (11) 1.4% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 94.8 (2408.03) | 96.16 (2442.59) | 1.36 (34.56) 1.4% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 5.31 (134.75) | 0.22 (5.5) 4.3% |
| Revolutions per mile (km) | 668.32 (415.28) | 658.87 (409.4) | -9.46 (-5.88) -1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.29 mph (32.65 km/h) |
| 25 mph (40.23 km/h) | 25.36 mph (40.81 km/h) |
| 30 mph (48.28 km/h) | 30.43 mph (48.97 km/h) |
| 35 mph (56.33 km/h) | 35.5 mph (57.14 km/h) |
| 40 mph (64.37 km/h) | 40.57 mph (65.3 km/h) |
| 45 mph (72.42 km/h) | 45.65 mph (73.46 km/h) |
| 50 mph (80.47 km/h) | 50.72 mph (81.62 km/h) |
| 55 mph (88.51 km/h) | 55.79 mph (89.78 km/h) |
| 60 mph (96.56 km/h) | 60.86 mph (97.95 km/h) |
| 65 mph (104.61 km/h) | 65.93 mph (106.11 km/h) |
| 70 mph (112.65 km/h) | 71 mph (114.27 km/h) |
| 75 mph (120.7 km/h) | 76.08 mph (122.43 km/h) |
| 80 mph (128.75 km/h) | 81.15 mph (130.6 km/h) |
| 85 mph (136.79 km/h) | 86.22 mph (138.76 km/h) |
| 90 mph (144.84 km/h) | 91.29 mph (146.92 km/h) |
| 95 mph (152.89 km/h) | 96.36 mph (155.08 km/h) |
| 100 mph (160.93 km/h) | 101.44 mph (163.24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1677 | 1948 | 2098 | 2190 | 2290 | 2362 | 2440 | 2533 | 2661 | 2790 | 2932 | 3047 | 3253 | 3482 | 3660 | 3774 | 3839 | 4074 | 4402 | 5116 |
Better Fuel Economy Factory Ratios Increased Power
