Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 215/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 28.46 (723) | 3.39 (86) 13.5% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 78.79 (2001.19) | 89.42 (2271.37) | 10.64 (270.18) 13.5% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 4.23 (107.5) | 1.69 (43) 66.7% |
| Revolutions per mile (km) | 804.19 (499.7) | 708.53 (440.26) | -95.66 (-59.44) -11.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.7 mph (36.53 km/h) |
| 25 mph (40.23 km/h) | 28.38 mph (45.67 km/h) |
| 30 mph (48.28 km/h) | 34.05 mph (54.8 km/h) |
| 35 mph (56.33 km/h) | 39.73 mph (63.93 km/h) |
| 40 mph (64.37 km/h) | 45.4 mph (73.06 km/h) |
| 45 mph (72.42 km/h) | 51.08 mph (82.2 km/h) |
| 50 mph (80.47 km/h) | 56.75 mph (91.33 km/h) |
| 55 mph (88.51 km/h) | 62.43 mph (100.46 km/h) |
| 60 mph (96.56 km/h) | 68.1 mph (109.6 km/h) |
| 65 mph (104.61 km/h) | 73.78 mph (118.73 km/h) |
| 70 mph (112.65 km/h) | 79.45 mph (127.86 km/h) |
| 75 mph (120.7 km/h) | 85.13 mph (137 km/h) |
| 80 mph (128.75 km/h) | 90.8 mph (146.13 km/h) |
| 85 mph (136.79 km/h) | 96.48 mph (155.26 km/h) |
| 90 mph (144.84 km/h) | 102.15 mph (164.4 km/h) |
| 95 mph (152.89 km/h) | 107.83 mph (173.53 km/h) |
| 100 mph (160.93 km/h) | 113.5 mph (182.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1803 | 2095 | 2256 | 2356 | 2463 | 2540 | 2624 | 2724 | 2862 | 3000 | 3153 | 3276 | 3499 | 3744 | 3936 | 4059 | 4128 | 4381 | 4734 | 5501 |
Better Fuel Economy Factory Ratios Increased Power
