Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.34 (821.5) | 34.07 (865.5) | 1.73 (44) 5.4% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 101.61 (2580.82) | 107.05 (2719.05) | 5.44 (138.23) 5.4% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 7.04 (178.75) | 0.87 (22) 14% |
| Revolutions per mile (km) | 623.58 (387.47) | 591.88 (367.78) | -31.7 (-19.7) -5.1% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.07 mph (33.91 km/h) |
| 25 mph (40.23 km/h) | 26.34 mph (42.39 km/h) |
| 30 mph (48.28 km/h) | 31.61 mph (50.87 km/h) |
| 35 mph (56.33 km/h) | 36.87 mph (59.34 km/h) |
| 40 mph (64.37 km/h) | 42.14 mph (67.82 km/h) |
| 45 mph (72.42 km/h) | 47.41 mph (76.3 km/h) |
| 50 mph (80.47 km/h) | 52.68 mph (84.78 km/h) |
| 55 mph (88.51 km/h) | 57.95 mph (93.25 km/h) |
| 60 mph (96.56 km/h) | 63.21 mph (101.73 km/h) |
| 65 mph (104.61 km/h) | 68.48 mph (110.21 km/h) |
| 70 mph (112.65 km/h) | 73.75 mph (118.69 km/h) |
| 75 mph (120.7 km/h) | 79.02 mph (127.17 km/h) |
| 80 mph (128.75 km/h) | 84.28 mph (135.64 km/h) |
| 85 mph (136.79 km/h) | 89.55 mph (144.12 km/h) |
| 90 mph (144.84 km/h) | 94.82 mph (152.6 km/h) |
| 95 mph (152.89 km/h) | 100.09 mph (161.08 km/h) |
| 100 mph (160.93 km/h) | 105.36 mph (169.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1506 | 1750 | 1884 | 1968 | 2057 | 2122 | 2192 | 2275 | 2391 | 2506 | 2634 | 2737 | 2923 | 3128 | 3288 | 3391 | 3448 | 3660 | 3955 | 4596 |
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