Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 235/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 25.55 (649) | 0.14 (3.5) 0.5% |
| Width inches (mm) | 10.83 (275) | 9.25 (235) | -1.57 (-40) -14.5% |
| Circum. inches (mm) | 79.84 (2027.9) | 80.27 (2038.89) | 0.43 (11) 0.5% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 2.78 (70.5) | 0.07 (1.75) 2.5% |
| Revolutions per mile (km) | 793.6 (493.12) | 789.32 (490.46) | -4.28 (-2.66) -0.5% |
235/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.11 mph (32.36 km/h) |
| 25 mph (40.23 km/h) | 25.14 mph (40.45 km/h) |
| 30 mph (48.28 km/h) | 30.16 mph (48.54 km/h) |
| 35 mph (56.33 km/h) | 35.19 mph (56.63 km/h) |
| 40 mph (64.37 km/h) | 40.22 mph (64.72 km/h) |
| 45 mph (72.42 km/h) | 45.24 mph (72.81 km/h) |
| 50 mph (80.47 km/h) | 50.27 mph (80.9 km/h) |
| 55 mph (88.51 km/h) | 55.3 mph (88.99 km/h) |
| 60 mph (96.56 km/h) | 60.33 mph (97.08 km/h) |
| 65 mph (104.61 km/h) | 65.35 mph (105.17 km/h) |
| 70 mph (112.65 km/h) | 70.38 mph (113.27 km/h) |
| 75 mph (120.7 km/h) | 75.41 mph (121.36 km/h) |
| 80 mph (128.75 km/h) | 80.43 mph (129.45 km/h) |
| 85 mph (136.79 km/h) | 85.46 mph (137.54 km/h) |
| 90 mph (144.84 km/h) | 90.49 mph (145.63 km/h) |
| 95 mph (152.89 km/h) | 95.52 mph (153.72 km/h) |
| 100 mph (160.93 km/h) | 100.54 mph (161.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2009 | 2333 | 2513 | 2624 | 2744 | 2829 | 2923 | 3034 | 3188 | 3342 | 3513 | 3650 | 3898 | 4171 | 4385 | 4522 | 4599 | 4881 | 5274 | 6129 |
Better Fuel Economy Factory Ratios Increased Power
