Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/60-20 | 305/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.46 (850) | 34.41 (874) | 0.94 (24) 2.8% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 105.13 (2670.35) | 108.1 (2745.75) | 2.97 (75.4) 2.8% |
| Sidewall Height inches (mm) | 6.73 (171) | 7.2 (183) | 0.47 (12) 7% |
| Revolutions per mile (km) | 602.67 (374.48) | 586.12 (364.2) | -16.55 (-10.28) -2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.56 mph (33.1 km/h) |
| 25 mph (40.23 km/h) | 25.71 mph (41.37 km/h) |
| 30 mph (48.28 km/h) | 30.85 mph (49.64 km/h) |
| 35 mph (56.33 km/h) | 35.99 mph (57.92 km/h) |
| 40 mph (64.37 km/h) | 41.13 mph (66.19 km/h) |
| 45 mph (72.42 km/h) | 46.27 mph (74.47 km/h) |
| 50 mph (80.47 km/h) | 51.41 mph (82.74 km/h) |
| 55 mph (88.51 km/h) | 56.55 mph (91.01 km/h) |
| 60 mph (96.56 km/h) | 61.69 mph (99.29 km/h) |
| 65 mph (104.61 km/h) | 66.84 mph (107.56 km/h) |
| 70 mph (112.65 km/h) | 71.98 mph (115.84 km/h) |
| 75 mph (120.7 km/h) | 77.12 mph (124.11 km/h) |
| 80 mph (128.75 km/h) | 82.26 mph (132.38 km/h) |
| 85 mph (136.79 km/h) | 87.4 mph (140.66 km/h) |
| 90 mph (144.84 km/h) | 92.54 mph (148.93 km/h) |
| 95 mph (152.89 km/h) | 97.68 mph (157.2 km/h) |
| 100 mph (160.93 km/h) | 102.82 mph (165.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1492 | 1733 | 1866 | 1949 | 2037 | 2101 | 2171 | 2253 | 2367 | 2482 | 2609 | 2710 | 2894 | 3097 | 3256 | 3358 | 3415 | 3624 | 3916 | 4551 |
Better Fuel Economy Factory Ratios Increased Power
