Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-20 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.07 (865.5) | 33.46 (850) | -0.61 (-15.5) -1.8% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 107.05 (2719.05) | 105.13 (2670.35) | -1.92 (-48.69) -1.8% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 6.73 (171) | -0.31 (-7.75) -4.3% |
| Revolutions per mile (km) | 591.88 (367.78) | 602.67 (374.48) | 10.79 (6.71) 1.8% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.64 mph (31.61 km/h) |
| 25 mph (40.23 km/h) | 24.55 mph (39.51 km/h) |
| 30 mph (48.28 km/h) | 29.46 mph (47.42 km/h) |
| 35 mph (56.33 km/h) | 34.37 mph (55.32 km/h) |
| 40 mph (64.37 km/h) | 39.28 mph (63.22 km/h) |
| 45 mph (72.42 km/h) | 44.19 mph (71.12 km/h) |
| 50 mph (80.47 km/h) | 49.1 mph (79.03 km/h) |
| 55 mph (88.51 km/h) | 54.02 mph (86.93 km/h) |
| 60 mph (96.56 km/h) | 58.93 mph (94.83 km/h) |
| 65 mph (104.61 km/h) | 63.84 mph (102.73 km/h) |
| 70 mph (112.65 km/h) | 68.75 mph (110.64 km/h) |
| 75 mph (120.7 km/h) | 73.66 mph (118.54 km/h) |
| 80 mph (128.75 km/h) | 78.57 mph (126.44 km/h) |
| 85 mph (136.79 km/h) | 83.48 mph (134.34 km/h) |
| 90 mph (144.84 km/h) | 88.39 mph (142.25 km/h) |
| 95 mph (152.89 km/h) | 93.3 mph (150.15 km/h) |
| 100 mph (160.93 km/h) | 98.21 mph (158.05 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1534 | 1782 | 1919 | 2004 | 2095 | 2160 | 2232 | 2317 | 2434 | 2552 | 2682 | 2787 | 2976 | 3185 | 3348 | 3452 | 3511 | 3727 | 4027 | 4679 |
Better Fuel Economy Factory Ratios Increased Power
