Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/60-14 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.74 (577.6) | 33.46 (850) | 10.72 (272.4) 47.2% |
| Width inches (mm) | 7.28 (185) | 11.22 (285) | 3.94 (100) 54.1% |
| Circum. inches (mm) | 71.44 (1814.58) | 105.13 (2670.35) | 33.69 (855.77) 47.2% |
| Sidewall Height inches (mm) | 4.37 (111) | 6.73 (171) | 2.36 (60) 54.1% |
| Revolutions per mile (km) | 886.89 (551.09) | 602.67 (374.48) | -284.22 (-176.61) -32% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.43 mph (47.37 km/h) |
| 25 mph (40.23 km/h) | 36.79 mph (59.21 km/h) |
| 30 mph (48.28 km/h) | 44.15 mph (71.05 km/h) |
| 35 mph (56.33 km/h) | 51.51 mph (82.89 km/h) |
| 40 mph (64.37 km/h) | 58.86 mph (94.73 km/h) |
| 45 mph (72.42 km/h) | 66.22 mph (106.57 km/h) |
| 50 mph (80.47 km/h) | 73.58 mph (118.42 km/h) |
| 55 mph (88.51 km/h) | 80.94 mph (130.26 km/h) |
| 60 mph (96.56 km/h) | 88.3 mph (142.1 km/h) |
| 65 mph (104.61 km/h) | 95.65 mph (153.94 km/h) |
| 70 mph (112.65 km/h) | 103.01 mph (165.78 km/h) |
| 75 mph (120.7 km/h) | 110.37 mph (177.62 km/h) |
| 80 mph (128.75 km/h) | 117.73 mph (189.47 km/h) |
| 85 mph (136.79 km/h) | 125.09 mph (201.31 km/h) |
| 90 mph (144.84 km/h) | 132.44 mph (213.15 km/h) |
| 95 mph (152.89 km/h) | 139.8 mph (224.99 km/h) |
| 100 mph (160.93 km/h) | 147.16 mph (236.83 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 |
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