Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 235/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 25.55 (649) | 0.47 (12) 1.9% |
| Width inches (mm) | 8.46 (215) | 9.25 (235) | 0.79 (20) 9.3% |
| Circum. inches (mm) | 78.79 (2001.19) | 80.27 (2038.89) | 1.48 (37.7) 1.9% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 2.78 (70.5) | 0.24 (6) 9.3% |
| Revolutions per mile (km) | 804.19 (499.7) | 789.32 (490.46) | -14.87 (-9.24) -1.8% |
235/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.38 mph (32.79 km/h) |
| 25 mph (40.23 km/h) | 25.47 mph (40.99 km/h) |
| 30 mph (48.28 km/h) | 30.57 mph (49.19 km/h) |
| 35 mph (56.33 km/h) | 35.66 mph (57.39 km/h) |
| 40 mph (64.37 km/h) | 40.75 mph (65.59 km/h) |
| 45 mph (72.42 km/h) | 45.85 mph (73.78 km/h) |
| 50 mph (80.47 km/h) | 50.94 mph (81.98 km/h) |
| 55 mph (88.51 km/h) | 56.04 mph (90.18 km/h) |
| 60 mph (96.56 km/h) | 61.13 mph (98.38 km/h) |
| 65 mph (104.61 km/h) | 66.22 mph (106.58 km/h) |
| 70 mph (112.65 km/h) | 71.32 mph (114.78 km/h) |
| 75 mph (120.7 km/h) | 76.41 mph (122.97 km/h) |
| 80 mph (128.75 km/h) | 81.51 mph (131.17 km/h) |
| 85 mph (136.79 km/h) | 86.6 mph (139.37 km/h) |
| 90 mph (144.84 km/h) | 91.7 mph (147.57 km/h) |
| 95 mph (152.89 km/h) | 96.79 mph (155.77 km/h) |
| 100 mph (160.93 km/h) | 101.88 mph (163.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
