Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 300/25-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 20.91 (531) | -4.17 (-106) -16.6% |
| Width inches (mm) | 8.46 (215) | 11.81 (300) | 3.35 (85) 39.5% |
| Circum. inches (mm) | 78.79 (2001.19) | 65.68 (1668.19) | -13.11 (-333.01) -16.6% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 2.95 (75) | 0.41 (10.5) 16.3% |
| Revolutions per mile (km) | 804.19 (499.7) | 964.73 (599.45) | 160.54 (99.75) 20% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.67 mph (26.83 km/h) |
| 25 mph (40.23 km/h) | 20.84 mph (33.54 km/h) |
| 30 mph (48.28 km/h) | 25.01 mph (40.25 km/h) |
| 35 mph (56.33 km/h) | 29.18 mph (46.95 km/h) |
| 40 mph (64.37 km/h) | 33.34 mph (53.66 km/h) |
| 45 mph (72.42 km/h) | 37.51 mph (60.37 km/h) |
| 50 mph (80.47 km/h) | 41.68 mph (67.08 km/h) |
| 55 mph (88.51 km/h) | 45.85 mph (73.78 km/h) |
| 60 mph (96.56 km/h) | 50.02 mph (80.49 km/h) |
| 65 mph (104.61 km/h) | 54.18 mph (87.2 km/h) |
| 70 mph (112.65 km/h) | 58.35 mph (93.91 km/h) |
| 75 mph (120.7 km/h) | 62.52 mph (100.62 km/h) |
| 80 mph (128.75 km/h) | 66.69 mph (107.32 km/h) |
| 85 mph (136.79 km/h) | 70.86 mph (114.03 km/h) |
| 90 mph (144.84 km/h) | 75.02 mph (120.74 km/h) |
| 95 mph (152.89 km/h) | 79.19 mph (127.45 km/h) |
| 100 mph (160.93 km/h) | 83.36 mph (134.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
