Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 215/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 27.62 (701.5) | 2.54 (64.5) 10.1% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 78.79 (2001.19) | 86.76 (2203.83) | 7.98 (202.63) 10.1% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 3.81 (96.75) | 1.27 (32.25) 50% |
| Revolutions per mile (km) | 804.19 (499.7) | 730.25 (453.76) | -73.94 (-45.95) -9.2% |
215/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.03 mph (35.45 km/h) |
| 25 mph (40.23 km/h) | 27.53 mph (44.31 km/h) |
| 30 mph (48.28 km/h) | 33.04 mph (53.17 km/h) |
| 35 mph (56.33 km/h) | 38.54 mph (62.03 km/h) |
| 40 mph (64.37 km/h) | 44.05 mph (70.89 km/h) |
| 45 mph (72.42 km/h) | 49.56 mph (79.75 km/h) |
| 50 mph (80.47 km/h) | 55.06 mph (88.62 km/h) |
| 55 mph (88.51 km/h) | 60.57 mph (97.48 km/h) |
| 60 mph (96.56 km/h) | 66.08 mph (106.34 km/h) |
| 65 mph (104.61 km/h) | 71.58 mph (115.2 km/h) |
| 70 mph (112.65 km/h) | 77.09 mph (124.06 km/h) |
| 75 mph (120.7 km/h) | 82.59 mph (132.92 km/h) |
| 80 mph (128.75 km/h) | 88.1 mph (141.78 km/h) |
| 85 mph (136.79 km/h) | 93.61 mph (150.65 km/h) |
| 90 mph (144.84 km/h) | 99.11 mph (159.51 km/h) |
| 95 mph (152.89 km/h) | 104.62 mph (168.37 km/h) |
| 100 mph (160.93 km/h) | 110.13 mph (177.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1858 | 2159 | 2325 | 2428 | 2538 | 2617 | 2704 | 2807 | 2950 | 3092 | 3250 | 3377 | 3606 | 3859 | 4057 | 4183 | 4254 | 4515 | 4879 | 5670 |
Better Fuel Economy Factory Ratios Increased Power
