Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 29.74 (755.5) | 4.33 (110) 17% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 79.84 (2027.9) | 93.44 (2373.47) | 13.61 (345.58) 17% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 4.87 (123.75) | 2.17 (55) 80% |
| Revolutions per mile (km) | 793.6 (493.12) | 678.05 (421.32) | -115.55 (-71.8) -14.6% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.41 mph (37.67 km/h) |
| 25 mph (40.23 km/h) | 29.26 mph (47.09 km/h) |
| 30 mph (48.28 km/h) | 35.11 mph (56.51 km/h) |
| 35 mph (56.33 km/h) | 40.96 mph (65.93 km/h) |
| 40 mph (64.37 km/h) | 46.82 mph (75.34 km/h) |
| 45 mph (72.42 km/h) | 52.67 mph (84.76 km/h) |
| 50 mph (80.47 km/h) | 58.52 mph (94.18 km/h) |
| 55 mph (88.51 km/h) | 64.37 mph (103.6 km/h) |
| 60 mph (96.56 km/h) | 70.22 mph (113.02 km/h) |
| 65 mph (104.61 km/h) | 76.08 mph (122.43 km/h) |
| 70 mph (112.65 km/h) | 81.93 mph (131.85 km/h) |
| 75 mph (120.7 km/h) | 87.78 mph (141.27 km/h) |
| 80 mph (128.75 km/h) | 93.63 mph (150.69 km/h) |
| 85 mph (136.79 km/h) | 99.48 mph (160.11 km/h) |
| 90 mph (144.84 km/h) | 105.34 mph (169.52 km/h) |
| 95 mph (152.89 km/h) | 111.19 mph (178.94 km/h) |
| 100 mph (160.93 km/h) | 117.04 mph (188.36 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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