Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 365/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 28.62 (727) | 3.54 (90) 14.1% |
| Width inches (mm) | 8.46 (215) | 14.37 (365) | 5.91 (150) 69.8% |
| Circum. inches (mm) | 78.79 (2001.19) | 89.92 (2283.94) | 11.13 (282.74) 14.1% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 4.31 (109.5) | 1.77 (45) 69.8% |
| Revolutions per mile (km) | 804.19 (499.7) | 704.64 (437.84) | -99.56 (-61.86) -12.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.83 mph (36.73 km/h) |
| 25 mph (40.23 km/h) | 28.53 mph (45.92 km/h) |
| 30 mph (48.28 km/h) | 34.24 mph (55.1 km/h) |
| 35 mph (56.33 km/h) | 39.95 mph (64.29 km/h) |
| 40 mph (64.37 km/h) | 45.65 mph (73.47 km/h) |
| 45 mph (72.42 km/h) | 51.36 mph (82.65 km/h) |
| 50 mph (80.47 km/h) | 57.06 mph (91.84 km/h) |
| 55 mph (88.51 km/h) | 62.77 mph (101.02 km/h) |
| 60 mph (96.56 km/h) | 68.48 mph (110.2 km/h) |
| 65 mph (104.61 km/h) | 74.18 mph (119.39 km/h) |
| 70 mph (112.65 km/h) | 79.89 mph (128.57 km/h) |
| 75 mph (120.7 km/h) | 85.6 mph (137.75 km/h) |
| 80 mph (128.75 km/h) | 91.3 mph (146.94 km/h) |
| 85 mph (136.79 km/h) | 97.01 mph (156.12 km/h) |
| 90 mph (144.84 km/h) | 102.72 mph (165.31 km/h) |
| 95 mph (152.89 km/h) | 108.42 mph (174.49 km/h) |
| 100 mph (160.93 km/h) | 114.13 mph (183.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1793 | 2083 | 2243 | 2343 | 2449 | 2526 | 2610 | 2709 | 2846 | 2984 | 3136 | 3258 | 3479 | 3724 | 3914 | 4037 | 4105 | 4357 | 4708 | 5471 |
Better Fuel Economy Factory Ratios Increased Power
