Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 29.74 (755.5) | 1.06 (27) 3.7% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 90.1 (2288.65) | 93.44 (2373.47) | 3.34 (84.82) 3.7% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 4.87 (123.75) | 0.53 (13.5) 12.2% |
| Revolutions per mile (km) | 703.18 (436.94) | 678.05 (421.32) | -25.13 (-15.62) -3.6% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.74 mph (33.38 km/h) |
| 25 mph (40.23 km/h) | 25.93 mph (41.72 km/h) |
| 30 mph (48.28 km/h) | 31.11 mph (50.07 km/h) |
| 35 mph (56.33 km/h) | 36.3 mph (58.41 km/h) |
| 40 mph (64.37 km/h) | 41.48 mph (66.76 km/h) |
| 45 mph (72.42 km/h) | 46.67 mph (75.1 km/h) |
| 50 mph (80.47 km/h) | 51.85 mph (83.45 km/h) |
| 55 mph (88.51 km/h) | 57.04 mph (91.79 km/h) |
| 60 mph (96.56 km/h) | 62.22 mph (100.14 km/h) |
| 65 mph (104.61 km/h) | 67.41 mph (108.48 km/h) |
| 70 mph (112.65 km/h) | 72.59 mph (116.83 km/h) |
| 75 mph (120.7 km/h) | 77.78 mph (125.17 km/h) |
| 80 mph (128.75 km/h) | 82.96 mph (133.52 km/h) |
| 85 mph (136.79 km/h) | 88.15 mph (141.86 km/h) |
| 90 mph (144.84 km/h) | 93.34 mph (150.21 km/h) |
| 95 mph (152.89 km/h) | 98.52 mph (158.55 km/h) |
| 100 mph (160.93 km/h) | 103.71 mph (166.9 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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