Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/65-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.59 (878.5) | 34.07 (865.5) | -0.51 (-13) -1.5% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 108.66 (2759.89) | 107.05 (2719.05) | -1.61 (-40.84) -1.5% |
| Sidewall Height inches (mm) | 7.29 (185.25) | 7.04 (178.75) | -0.26 (-6.5) -3.5% |
| Revolutions per mile (km) | 583.12 (362.33) | 591.88 (367.78) | 8.76 (5.44) 1.5% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.7 mph (31.71 km/h) |
| 25 mph (40.23 km/h) | 24.63 mph (39.64 km/h) |
| 30 mph (48.28 km/h) | 29.56 mph (47.57 km/h) |
| 35 mph (56.33 km/h) | 34.48 mph (55.49 km/h) |
| 40 mph (64.37 km/h) | 39.41 mph (63.42 km/h) |
| 45 mph (72.42 km/h) | 44.33 mph (71.35 km/h) |
| 50 mph (80.47 km/h) | 49.26 mph (79.28 km/h) |
| 55 mph (88.51 km/h) | 54.19 mph (87.2 km/h) |
| 60 mph (96.56 km/h) | 59.11 mph (95.13 km/h) |
| 65 mph (104.61 km/h) | 64.04 mph (103.06 km/h) |
| 70 mph (112.65 km/h) | 68.96 mph (110.99 km/h) |
| 75 mph (120.7 km/h) | 73.89 mph (118.91 km/h) |
| 80 mph (128.75 km/h) | 78.82 mph (126.84 km/h) |
| 85 mph (136.79 km/h) | 83.74 mph (134.77 km/h) |
| 90 mph (144.84 km/h) | 88.67 mph (142.7 km/h) |
| 95 mph (152.89 km/h) | 93.59 mph (150.63 km/h) |
| 100 mph (160.93 km/h) | 98.52 mph (158.55 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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