Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-20 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.81 (782.5) | 31.91 (810.5) | 1.1 (28) 3.6% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 96.78 (2458.3) | 100.25 (2546.26) | 3.46 (87.96) 3.6% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 5.95 (151.25) | 0.55 (14) 10.2% |
| Revolutions per mile (km) | 654.66 (406.79) | 632.04 (392.73) | -22.62 (-14.05) -3.5% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.72 mph (33.34 km/h) |
| 25 mph (40.23 km/h) | 25.89 mph (41.67 km/h) |
| 30 mph (48.28 km/h) | 31.07 mph (50.01 km/h) |
| 35 mph (56.33 km/h) | 36.25 mph (58.34 km/h) |
| 40 mph (64.37 km/h) | 41.43 mph (66.68 km/h) |
| 45 mph (72.42 km/h) | 46.61 mph (75.01 km/h) |
| 50 mph (80.47 km/h) | 51.79 mph (83.35 km/h) |
| 55 mph (88.51 km/h) | 56.97 mph (91.68 km/h) |
| 60 mph (96.56 km/h) | 62.15 mph (100.02 km/h) |
| 65 mph (104.61 km/h) | 67.33 mph (108.35 km/h) |
| 70 mph (112.65 km/h) | 72.5 mph (116.69 km/h) |
| 75 mph (120.7 km/h) | 77.68 mph (125.02 km/h) |
| 80 mph (128.75 km/h) | 82.86 mph (133.35 km/h) |
| 85 mph (136.79 km/h) | 88.04 mph (141.69 km/h) |
| 90 mph (144.84 km/h) | 93.22 mph (150.02 km/h) |
| 95 mph (152.89 km/h) | 98.4 mph (158.36 km/h) |
| 100 mph (160.93 km/h) | 103.58 mph (166.69 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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