Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/55-20 | 255/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.48 (799.5) | 31.04 (788.5) | -0.43 (-11) -1.4% |
| Width inches (mm) | 10.43 (265) | 10.04 (255) | -0.39 (-10) -3.8% |
| Circum. inches (mm) | 98.89 (2511.7) | 97.53 (2477.15) | -1.36 (-34.56) -1.4% |
| Sidewall Height inches (mm) | 5.74 (145.75) | 5.52 (140.25) | -0.22 (-5.5) -3.8% |
| Revolutions per mile (km) | 640.74 (398.14) | 649.68 (403.69) | 8.94 (5.55) 1.4% |
255/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.72 mph (31.74 km/h) |
| 25 mph (40.23 km/h) | 24.66 mph (39.68 km/h) |
| 30 mph (48.28 km/h) | 29.59 mph (47.62 km/h) |
| 35 mph (56.33 km/h) | 34.52 mph (55.55 km/h) |
| 40 mph (64.37 km/h) | 39.45 mph (63.49 km/h) |
| 45 mph (72.42 km/h) | 44.38 mph (71.42 km/h) |
| 50 mph (80.47 km/h) | 49.31 mph (79.36 km/h) |
| 55 mph (88.51 km/h) | 54.24 mph (87.3 km/h) |
| 60 mph (96.56 km/h) | 59.17 mph (95.23 km/h) |
| 65 mph (104.61 km/h) | 64.11 mph (103.17 km/h) |
| 70 mph (112.65 km/h) | 69.04 mph (111.1 km/h) |
| 75 mph (120.7 km/h) | 73.97 mph (119.04 km/h) |
| 80 mph (128.75 km/h) | 78.9 mph (126.98 km/h) |
| 85 mph (136.79 km/h) | 83.83 mph (134.91 km/h) |
| 90 mph (144.84 km/h) | 88.76 mph (142.85 km/h) |
| 95 mph (152.89 km/h) | 93.69 mph (150.78 km/h) |
| 100 mph (160.93 km/h) | 98.62 mph (158.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1921 | 2068 | 2160 | 2258 | 2329 | 2406 | 2498 | 2624 | 2751 | 2892 | 3004 | 3208 | 3433 | 3609 | 3722 | 3785 | 4017 | 4341 | 5044 |
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