Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/75-20 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.01 (965.5) | 34.07 (865.5) | -3.94 (-100) -10.4% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 119.42 (3033.21) | 107.05 (2719.05) | -12.37 (-314.16) -10.4% |
| Sidewall Height inches (mm) | 9.01 (228.75) | 7.04 (178.75) | -1.97 (-50) -21.9% |
| Revolutions per mile (km) | 530.57 (329.68) | 591.88 (367.78) | 61.3 (38.09) 11.6% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.93 mph (28.85 km/h) |
| 25 mph (40.23 km/h) | 22.41 mph (36.07 km/h) |
| 30 mph (48.28 km/h) | 26.89 mph (43.28 km/h) |
| 35 mph (56.33 km/h) | 31.37 mph (50.49 km/h) |
| 40 mph (64.37 km/h) | 35.86 mph (57.71 km/h) |
| 45 mph (72.42 km/h) | 40.34 mph (64.92 km/h) |
| 50 mph (80.47 km/h) | 44.82 mph (72.13 km/h) |
| 55 mph (88.51 km/h) | 49.3 mph (79.35 km/h) |
| 60 mph (96.56 km/h) | 53.79 mph (86.56 km/h) |
| 65 mph (104.61 km/h) | 58.27 mph (93.77 km/h) |
| 70 mph (112.65 km/h) | 62.75 mph (100.99 km/h) |
| 75 mph (120.7 km/h) | 67.23 mph (108.2 km/h) |
| 80 mph (128.75 km/h) | 71.71 mph (115.41 km/h) |
| 85 mph (136.79 km/h) | 76.2 mph (122.63 km/h) |
| 90 mph (144.84 km/h) | 80.68 mph (129.84 km/h) |
| 95 mph (152.89 km/h) | 85.16 mph (137.05 km/h) |
| 100 mph (160.93 km/h) | 89.64 mph (144.27 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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