Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/55-20 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.21 (843.5) | 31.91 (810.5) | -1.3 (-33) -3.9% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 104.33 (2649.93) | 100.25 (2546.26) | -4.08 (-103.67) -3.9% |
| Sidewall Height inches (mm) | 6.6 (167.75) | 5.95 (151.25) | -0.65 (-16.5) -9.8% |
| Revolutions per mile (km) | 607.31 (377.37) | 632.04 (392.73) | 24.73 (15.36) 4.1% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.22 mph (30.93 km/h) |
| 25 mph (40.23 km/h) | 24.02 mph (38.66 km/h) |
| 30 mph (48.28 km/h) | 28.83 mph (46.39 km/h) |
| 35 mph (56.33 km/h) | 33.63 mph (54.12 km/h) |
| 40 mph (64.37 km/h) | 38.44 mph (61.86 km/h) |
| 45 mph (72.42 km/h) | 43.24 mph (69.59 km/h) |
| 50 mph (80.47 km/h) | 48.04 mph (77.32 km/h) |
| 55 mph (88.51 km/h) | 52.85 mph (85.05 km/h) |
| 60 mph (96.56 km/h) | 57.65 mph (92.78 km/h) |
| 65 mph (104.61 km/h) | 62.46 mph (100.52 km/h) |
| 70 mph (112.65 km/h) | 67.26 mph (108.25 km/h) |
| 75 mph (120.7 km/h) | 72.07 mph (115.98 km/h) |
| 80 mph (128.75 km/h) | 76.87 mph (123.71 km/h) |
| 85 mph (136.79 km/h) | 81.67 mph (131.44 km/h) |
| 90 mph (144.84 km/h) | 86.48 mph (139.17 km/h) |
| 95 mph (152.89 km/h) | 91.28 mph (146.91 km/h) |
| 100 mph (160.93 km/h) | 96.09 mph (154.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
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