Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/60-20 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.88 (886) | 33.46 (850) | -1.42 (-36) -4.1% |
| Width inches (mm) | 12.4 (315) | 11.22 (285) | -1.18 (-30) -9.5% |
| Circum. inches (mm) | 109.58 (2783.45) | 105.13 (2670.35) | -4.45 (-113.1) -4.1% |
| Sidewall Height inches (mm) | 7.44 (189) | 6.73 (171) | -0.71 (-18) -9.5% |
| Revolutions per mile (km) | 578.18 (359.27) | 602.67 (374.48) | 24.49 (15.22) 4.2% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.19 mph (30.88 km/h) |
| 25 mph (40.23 km/h) | 23.98 mph (38.6 km/h) |
| 30 mph (48.28 km/h) | 28.78 mph (46.32 km/h) |
| 35 mph (56.33 km/h) | 33.58 mph (54.04 km/h) |
| 40 mph (64.37 km/h) | 38.37 mph (61.76 km/h) |
| 45 mph (72.42 km/h) | 43.17 mph (69.48 km/h) |
| 50 mph (80.47 km/h) | 47.97 mph (77.2 km/h) |
| 55 mph (88.51 km/h) | 52.77 mph (84.92 km/h) |
| 60 mph (96.56 km/h) | 57.56 mph (92.64 km/h) |
| 65 mph (104.61 km/h) | 62.36 mph (100.36 km/h) |
| 70 mph (112.65 km/h) | 67.16 mph (108.08 km/h) |
| 75 mph (120.7 km/h) | 71.95 mph (115.8 km/h) |
| 80 mph (128.75 km/h) | 76.75 mph (123.52 km/h) |
| 85 mph (136.79 km/h) | 81.55 mph (131.24 km/h) |
| 90 mph (144.84 km/h) | 86.34 mph (138.96 km/h) |
| 95 mph (152.89 km/h) | 91.14 mph (146.68 km/h) |
| 100 mph (160.93 km/h) | 95.94 mph (154.4 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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