Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 215/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 23.39 (594) | -1.69 (-43) -6.8% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 78.79 (2001.19) | 73.47 (1866.11) | -5.32 (-135.09) -6.8% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 1.69 (43) | -0.85 (-21.5) -33.3% |
| Revolutions per mile (km) | 804.19 (499.7) | 862.41 (535.87) | 58.22 (36.17) 7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.65 mph (30.01 km/h) |
| 25 mph (40.23 km/h) | 23.31 mph (37.52 km/h) |
| 30 mph (48.28 km/h) | 27.97 mph (45.02 km/h) |
| 35 mph (56.33 km/h) | 32.64 mph (52.52 km/h) |
| 40 mph (64.37 km/h) | 37.3 mph (60.03 km/h) |
| 45 mph (72.42 km/h) | 41.96 mph (67.53 km/h) |
| 50 mph (80.47 km/h) | 46.62 mph (75.04 km/h) |
| 55 mph (88.51 km/h) | 51.29 mph (82.54 km/h) |
| 60 mph (96.56 km/h) | 55.95 mph (90.04 km/h) |
| 65 mph (104.61 km/h) | 60.61 mph (97.55 km/h) |
| 70 mph (112.65 km/h) | 65.27 mph (105.05 km/h) |
| 75 mph (120.7 km/h) | 69.94 mph (112.55 km/h) |
| 80 mph (128.75 km/h) | 74.6 mph (120.06 km/h) |
| 85 mph (136.79 km/h) | 79.26 mph (127.56 km/h) |
| 90 mph (144.84 km/h) | 83.92 mph (135.06 km/h) |
| 95 mph (152.89 km/h) | 88.59 mph (142.57 km/h) |
| 100 mph (160.93 km/h) | 93.25 mph (150.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2195 | 2550 | 2746 | 2867 | 2998 | 3091 | 3194 | 3315 | 3483 | 3652 | 3838 | 3988 | 4259 | 4557 | 4791 | 4940 | 5024 | 5333 | 5762 | 6696 |
Better Fuel Economy Factory Ratios Increased Power
