Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-20 | 255/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.18 (766.5) | 35.06 (890.5) | 4.88 (124) 16.2% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 94.8 (2408.03) | 110.14 (2797.59) | 15.34 (389.56) 16.2% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 7.53 (191.25) | 2.44 (62) 48% |
| Revolutions per mile (km) | 668.32 (415.28) | 575.26 (357.45) | -93.06 (-57.83) -13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.24 mph (37.39 km/h) |
| 25 mph (40.23 km/h) | 29.04 mph (46.74 km/h) |
| 30 mph (48.28 km/h) | 34.85 mph (56.09 km/h) |
| 35 mph (56.33 km/h) | 40.66 mph (65.44 km/h) |
| 40 mph (64.37 km/h) | 46.47 mph (74.79 km/h) |
| 45 mph (72.42 km/h) | 52.28 mph (84.14 km/h) |
| 50 mph (80.47 km/h) | 58.09 mph (93.48 km/h) |
| 55 mph (88.51 km/h) | 63.9 mph (102.83 km/h) |
| 60 mph (96.56 km/h) | 69.71 mph (112.18 km/h) |
| 65 mph (104.61 km/h) | 75.52 mph (121.53 km/h) |
| 70 mph (112.65 km/h) | 81.32 mph (130.88 km/h) |
| 75 mph (120.7 km/h) | 87.13 mph (140.23 km/h) |
| 80 mph (128.75 km/h) | 92.94 mph (149.58 km/h) |
| 85 mph (136.79 km/h) | 98.75 mph (158.92 km/h) |
| 90 mph (144.84 km/h) | 104.56 mph (168.27 km/h) |
| 95 mph (152.89 km/h) | 110.37 mph (177.62 km/h) |
| 100 mph (160.93 km/h) | 116.18 mph (186.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1464 | 1701 | 1831 | 1912 | 2000 | 2062 | 2130 | 2211 | 2324 | 2436 | 2560 | 2660 | 2841 | 3040 | 3196 | 3295 | 3351 | 3557 | 3844 | 4467 |
Better Fuel Economy Factory Ratios Increased Power
