Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/30-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673) | 29.74 (755.5) | 3.25 (82.5) 12.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 83.24 (2114.29) | 93.44 (2373.47) | 10.2 (259.18) 12.3% |
| Sidewall Height inches (mm) | 3.25 (82.5) | 4.87 (123.75) | 1.62 (41.25) 50% |
| Revolutions per mile (km) | 761.17 (472.97) | 678.05 (421.32) | -83.12 (-51.65) -10.9% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.45 mph (36.13 km/h) |
| 25 mph (40.23 km/h) | 28.06 mph (45.17 km/h) |
| 30 mph (48.28 km/h) | 33.68 mph (54.2 km/h) |
| 35 mph (56.33 km/h) | 39.29 mph (63.23 km/h) |
| 40 mph (64.37 km/h) | 44.9 mph (72.27 km/h) |
| 45 mph (72.42 km/h) | 50.52 mph (81.3 km/h) |
| 50 mph (80.47 km/h) | 56.13 mph (90.33 km/h) |
| 55 mph (88.51 km/h) | 61.74 mph (99.36 km/h) |
| 60 mph (96.56 km/h) | 67.36 mph (108.4 km/h) |
| 65 mph (104.61 km/h) | 72.97 mph (117.43 km/h) |
| 70 mph (112.65 km/h) | 78.58 mph (126.46 km/h) |
| 75 mph (120.7 km/h) | 84.19 mph (135.5 km/h) |
| 80 mph (128.75 km/h) | 89.81 mph (144.53 km/h) |
| 85 mph (136.79 km/h) | 95.42 mph (153.56 km/h) |
| 90 mph (144.84 km/h) | 101.03 mph (162.6 km/h) |
| 95 mph (152.89 km/h) | 106.65 mph (171.63 km/h) |
| 100 mph (160.93 km/h) | 112.26 mph (180.66 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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