Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 215/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 29.31 (744.5) | 4.23 (107.5) 16.9% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 78.79 (2001.19) | 92.08 (2338.92) | 13.3 (337.72) 16.9% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 4.66 (118.25) | 2.12 (53.75) 83.3% |
| Revolutions per mile (km) | 804.19 (499.7) | 688.07 (427.55) | -116.12 (-72.15) -14.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.38 mph (37.62 km/h) |
| 25 mph (40.23 km/h) | 29.22 mph (47.02 km/h) |
| 30 mph (48.28 km/h) | 35.06 mph (56.43 km/h) |
| 35 mph (56.33 km/h) | 40.91 mph (65.83 km/h) |
| 40 mph (64.37 km/h) | 46.75 mph (75.24 km/h) |
| 45 mph (72.42 km/h) | 52.59 mph (84.64 km/h) |
| 50 mph (80.47 km/h) | 58.44 mph (94.05 km/h) |
| 55 mph (88.51 km/h) | 64.28 mph (103.45 km/h) |
| 60 mph (96.56 km/h) | 70.13 mph (112.86 km/h) |
| 65 mph (104.61 km/h) | 75.97 mph (122.26 km/h) |
| 70 mph (112.65 km/h) | 81.81 mph (131.67 km/h) |
| 75 mph (120.7 km/h) | 87.66 mph (141.07 km/h) |
| 80 mph (128.75 km/h) | 93.5 mph (150.48 km/h) |
| 85 mph (136.79 km/h) | 99.34 mph (159.88 km/h) |
| 90 mph (144.84 km/h) | 105.19 mph (169.28 km/h) |
| 95 mph (152.89 km/h) | 111.03 mph (178.69 km/h) |
| 100 mph (160.93 km/h) | 116.88 mph (188.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1751 | 2034 | 2191 | 2287 | 2392 | 2466 | 2548 | 2645 | 2779 | 2913 | 3062 | 3182 | 3398 | 3636 | 3822 | 3942 | 4009 | 4255 | 4597 | 5342 |
Better Fuel Economy Factory Ratios Increased Power
