Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/60-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.46 (850) | 34.07 (865.5) | 0.61 (15.5) 1.8% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 105.13 (2670.35) | 107.05 (2719.05) | 1.92 (48.69) 1.8% |
| Sidewall Height inches (mm) | 6.73 (171) | 7.04 (178.75) | 0.31 (7.75) 4.5% |
| Revolutions per mile (km) | 602.67 (374.48) | 591.88 (367.78) | -10.79 (-6.71) -1.8% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.36 mph (32.77 km/h) |
| 25 mph (40.23 km/h) | 25.46 mph (40.97 km/h) |
| 30 mph (48.28 km/h) | 30.55 mph (49.16 km/h) |
| 35 mph (56.33 km/h) | 35.64 mph (57.35 km/h) |
| 40 mph (64.37 km/h) | 40.73 mph (65.55 km/h) |
| 45 mph (72.42 km/h) | 45.82 mph (73.74 km/h) |
| 50 mph (80.47 km/h) | 50.91 mph (81.93 km/h) |
| 55 mph (88.51 km/h) | 56 mph (90.13 km/h) |
| 60 mph (96.56 km/h) | 61.09 mph (98.32 km/h) |
| 65 mph (104.61 km/h) | 66.19 mph (106.52 km/h) |
| 70 mph (112.65 km/h) | 71.28 mph (114.71 km/h) |
| 75 mph (120.7 km/h) | 76.37 mph (122.9 km/h) |
| 80 mph (128.75 km/h) | 81.46 mph (131.1 km/h) |
| 85 mph (136.79 km/h) | 86.55 mph (139.29 km/h) |
| 90 mph (144.84 km/h) | 91.64 mph (147.48 km/h) |
| 95 mph (152.89 km/h) | 96.73 mph (155.68 km/h) |
| 100 mph (160.93 km/h) | 101.82 mph (163.87 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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