Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-19 | 255/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.74 (730.1) | 30.04 (763) | 1.3 (32.9) 4.5% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 90.3 (2293.68) | 94.37 (2397.04) | 4.07 (103.36) 4.5% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.02 (127.5) | 0.15 (3.75) 3% |
| Revolutions per mile (km) | 701.64 (435.98) | 671.39 (417.18) | -30.25 (-18.8) -4.3% |
255/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.9 mph (33.64 km/h) |
| 25 mph (40.23 km/h) | 26.13 mph (42.05 km/h) |
| 30 mph (48.28 km/h) | 31.35 mph (50.46 km/h) |
| 35 mph (56.33 km/h) | 36.58 mph (58.87 km/h) |
| 40 mph (64.37 km/h) | 41.8 mph (67.27 km/h) |
| 45 mph (72.42 km/h) | 47.03 mph (75.68 km/h) |
| 50 mph (80.47 km/h) | 52.25 mph (84.09 km/h) |
| 55 mph (88.51 km/h) | 57.48 mph (92.5 km/h) |
| 60 mph (96.56 km/h) | 62.7 mph (100.91 km/h) |
| 65 mph (104.61 km/h) | 67.93 mph (109.32 km/h) |
| 70 mph (112.65 km/h) | 73.15 mph (117.73 km/h) |
| 75 mph (120.7 km/h) | 78.38 mph (126.14 km/h) |
| 80 mph (128.75 km/h) | 83.6 mph (134.55 km/h) |
| 85 mph (136.79 km/h) | 88.83 mph (142.96 km/h) |
| 90 mph (144.84 km/h) | 94.06 mph (151.37 km/h) |
| 95 mph (152.89 km/h) | 99.28 mph (159.78 km/h) |
| 100 mph (160.93 km/h) | 104.51 mph (168.19 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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