Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-18 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.83 (884.7) | 34.07 (865.5) | -0.76 (-19.2) -2.2% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 109.42 (2779.37) | 107.05 (2719.05) | -2.37 (-60.32) -2.2% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 7.04 (178.75) | -1.38 (-35) -16.4% |
| Revolutions per mile (km) | 579.03 (359.79) | 591.88 (367.78) | 12.85 (7.98) 2.2% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.57 mph (31.49 km/h) |
| 25 mph (40.23 km/h) | 24.46 mph (39.36 km/h) |
| 30 mph (48.28 km/h) | 29.35 mph (47.23 km/h) |
| 35 mph (56.33 km/h) | 34.24 mph (55.1 km/h) |
| 40 mph (64.37 km/h) | 39.13 mph (62.98 km/h) |
| 45 mph (72.42 km/h) | 44.02 mph (70.85 km/h) |
| 50 mph (80.47 km/h) | 48.91 mph (78.72 km/h) |
| 55 mph (88.51 km/h) | 53.81 mph (86.59 km/h) |
| 60 mph (96.56 km/h) | 58.7 mph (94.47 km/h) |
| 65 mph (104.61 km/h) | 63.59 mph (102.34 km/h) |
| 70 mph (112.65 km/h) | 68.48 mph (110.21 km/h) |
| 75 mph (120.7 km/h) | 73.37 mph (118.08 km/h) |
| 80 mph (128.75 km/h) | 78.26 mph (125.95 km/h) |
| 85 mph (136.79 km/h) | 83.16 mph (133.83 km/h) |
| 90 mph (144.84 km/h) | 88.05 mph (141.7 km/h) |
| 95 mph (152.89 km/h) | 92.94 mph (149.57 km/h) |
| 100 mph (160.93 km/h) | 97.83 mph (157.44 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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