Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.91 (810.5) | 29.74 (755.5) | -2.17 (-55) -6.8% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 100.25 (2546.26) | 93.44 (2373.47) | -6.8 (-172.79) -6.8% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 4.87 (123.75) | -1.08 (-27.5) -18.2% |
| Revolutions per mile (km) | 632.04 (392.73) | 678.05 (421.32) | 46.01 (28.59) 7.3% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.64 mph (30 km/h) |
| 25 mph (40.23 km/h) | 23.3 mph (37.5 km/h) |
| 30 mph (48.28 km/h) | 27.96 mph (45 km/h) |
| 35 mph (56.33 km/h) | 32.62 mph (52.5 km/h) |
| 40 mph (64.37 km/h) | 37.29 mph (60.01 km/h) |
| 45 mph (72.42 km/h) | 41.95 mph (67.51 km/h) |
| 50 mph (80.47 km/h) | 46.61 mph (75.01 km/h) |
| 55 mph (88.51 km/h) | 51.27 mph (82.51 km/h) |
| 60 mph (96.56 km/h) | 55.93 mph (90.01 km/h) |
| 65 mph (104.61 km/h) | 60.59 mph (97.51 km/h) |
| 70 mph (112.65 km/h) | 65.25 mph (105.01 km/h) |
| 75 mph (120.7 km/h) | 69.91 mph (112.51 km/h) |
| 80 mph (128.75 km/h) | 74.57 mph (120.01 km/h) |
| 85 mph (136.79 km/h) | 79.23 mph (127.51 km/h) |
| 90 mph (144.84 km/h) | 83.89 mph (135.01 km/h) |
| 95 mph (152.89 km/h) | 88.55 mph (142.51 km/h) |
| 100 mph (160.93 km/h) | 93.21 mph (150.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1726 | 2005 | 2159 | 2254 | 2357 | 2430 | 2511 | 2607 | 2739 | 2871 | 3018 | 3135 | 3348 | 3583 | 3767 | 3884 | 3950 | 4193 | 4530 | 5265 |
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