Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-20 | 255/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.74 (755.5) | 30.04 (763) | 0.3 (7.5) 1% |
| Width inches (mm) | 10.83 (275) | 10.04 (255) | -0.79 (-20) -7.3% |
| Circum. inches (mm) | 93.44 (2373.47) | 94.37 (2397.04) | 0.93 (23.56) 1% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.02 (127.5) | 0.15 (3.75) 3% |
| Revolutions per mile (km) | 678.05 (421.32) | 671.39 (417.18) | -6.67 (-4.14) -1% |
255/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.2 mph (32.51 km/h) |
| 25 mph (40.23 km/h) | 25.25 mph (40.63 km/h) |
| 30 mph (48.28 km/h) | 30.3 mph (48.76 km/h) |
| 35 mph (56.33 km/h) | 35.35 mph (56.89 km/h) |
| 40 mph (64.37 km/h) | 40.4 mph (65.01 km/h) |
| 45 mph (72.42 km/h) | 45.45 mph (73.14 km/h) |
| 50 mph (80.47 km/h) | 50.5 mph (81.27 km/h) |
| 55 mph (88.51 km/h) | 55.55 mph (89.39 km/h) |
| 60 mph (96.56 km/h) | 60.6 mph (97.52 km/h) |
| 65 mph (104.61 km/h) | 65.65 mph (105.65 km/h) |
| 70 mph (112.65 km/h) | 70.69 mph (113.77 km/h) |
| 75 mph (120.7 km/h) | 75.74 mph (121.9 km/h) |
| 80 mph (128.75 km/h) | 80.79 mph (130.03 km/h) |
| 85 mph (136.79 km/h) | 85.84 mph (138.15 km/h) |
| 90 mph (144.84 km/h) | 90.89 mph (146.28 km/h) |
| 95 mph (152.89 km/h) | 95.94 mph (154.41 km/h) |
| 100 mph (160.93 km/h) | 100.99 mph (162.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1985 | 2138 | 2232 | 2334 | 2407 | 2486 | 2581 | 2712 | 2843 | 2988 | 3104 | 3315 | 3548 | 3730 | 3846 | 3912 | 4151 | 4486 | 5213 |
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