Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.04 (763) | 29.74 (755.5) | -0.3 (-7.5) -1% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 94.37 (2397.04) | 93.44 (2373.47) | -0.93 (-23.56) -1% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 4.87 (123.75) | -0.15 (-3.75) -2.9% |
| Revolutions per mile (km) | 671.39 (417.18) | 678.05 (421.32) | 6.67 (4.14) 1% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.8 mph (31.87 km/h) |
| 25 mph (40.23 km/h) | 24.75 mph (39.84 km/h) |
| 30 mph (48.28 km/h) | 29.71 mph (47.81 km/h) |
| 35 mph (56.33 km/h) | 34.66 mph (55.77 km/h) |
| 40 mph (64.37 km/h) | 39.61 mph (63.74 km/h) |
| 45 mph (72.42 km/h) | 44.56 mph (71.71 km/h) |
| 50 mph (80.47 km/h) | 49.51 mph (79.68 km/h) |
| 55 mph (88.51 km/h) | 54.46 mph (87.64 km/h) |
| 60 mph (96.56 km/h) | 59.41 mph (95.61 km/h) |
| 65 mph (104.61 km/h) | 64.36 mph (103.58 km/h) |
| 70 mph (112.65 km/h) | 69.31 mph (111.55 km/h) |
| 75 mph (120.7 km/h) | 74.26 mph (119.51 km/h) |
| 80 mph (128.75 km/h) | 79.21 mph (127.48 km/h) |
| 85 mph (136.79 km/h) | 84.16 mph (135.45 km/h) |
| 90 mph (144.84 km/h) | 89.12 mph (143.42 km/h) |
| 95 mph (152.89 km/h) | 94.07 mph (151.39 km/h) |
| 100 mph (160.93 km/h) | 99.02 mph (159.35 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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