Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 385/30-26 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 35.09 (891.4) | 10.02 (254.4) 39.9% |
| Width inches (mm) | 8.46 (215) | 15.16 (385) | 6.69 (170) 79.1% |
| Circum. inches (mm) | 78.79 (2001.19) | 110.25 (2800.42) | 31.47 (799.22) 39.9% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 4.55 (115.5) | 2.01 (51) 79.1% |
| Revolutions per mile (km) | 804.19 (499.7) | 574.68 (357.09) | -229.51 (-142.61) -28.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.99 mph (45.04 km/h) |
| 25 mph (40.23 km/h) | 34.98 mph (56.3 km/h) |
| 30 mph (48.28 km/h) | 41.98 mph (67.56 km/h) |
| 35 mph (56.33 km/h) | 48.98 mph (78.82 km/h) |
| 40 mph (64.37 km/h) | 55.97 mph (90.08 km/h) |
| 45 mph (72.42 km/h) | 62.97 mph (101.34 km/h) |
| 50 mph (80.47 km/h) | 69.97 mph (112.6 km/h) |
| 55 mph (88.51 km/h) | 76.97 mph (123.86 km/h) |
| 60 mph (96.56 km/h) | 83.96 mph (135.12 km/h) |
| 65 mph (104.61 km/h) | 90.96 mph (146.38 km/h) |
| 70 mph (112.65 km/h) | 97.96 mph (157.65 km/h) |
| 75 mph (120.7 km/h) | 104.95 mph (168.91 km/h) |
| 80 mph (128.75 km/h) | 111.95 mph (180.17 km/h) |
| 85 mph (136.79 km/h) | 118.95 mph (191.43 km/h) |
| 90 mph (144.84 km/h) | 125.94 mph (202.69 km/h) |
| 95 mph (152.89 km/h) | 132.94 mph (213.95 km/h) |
| 100 mph (160.93 km/h) | 139.94 mph (225.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1462 | 1699 | 1830 | 1911 | 1998 | 2060 | 2128 | 2209 | 2321 | 2433 | 2558 | 2657 | 2838 | 3037 | 3193 | 3292 | 3348 | 3553 | 3840 | 4462 |
Better Fuel Economy Factory Ratios Increased Power
