Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-20 | 255/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.91 (810.5) | 31.04 (788.5) | -0.87 (-22) -2.7% |
| Width inches (mm) | 10.83 (275) | 10.04 (255) | -0.79 (-20) -7.3% |
| Circum. inches (mm) | 100.25 (2546.26) | 97.53 (2477.15) | -2.72 (-69.12) -2.7% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 5.52 (140.25) | -0.43 (-11) -7.3% |
| Revolutions per mile (km) | 632.04 (392.73) | 649.68 (403.69) | 17.63 (10.96) 2.8% |
255/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.46 mph (31.31 km/h) |
| 25 mph (40.23 km/h) | 24.32 mph (39.14 km/h) |
| 30 mph (48.28 km/h) | 29.19 mph (46.97 km/h) |
| 35 mph (56.33 km/h) | 34.05 mph (54.8 km/h) |
| 40 mph (64.37 km/h) | 38.91 mph (62.63 km/h) |
| 45 mph (72.42 km/h) | 43.78 mph (70.45 km/h) |
| 50 mph (80.47 km/h) | 48.64 mph (78.28 km/h) |
| 55 mph (88.51 km/h) | 53.51 mph (86.11 km/h) |
| 60 mph (96.56 km/h) | 58.37 mph (93.94 km/h) |
| 65 mph (104.61 km/h) | 63.24 mph (101.77 km/h) |
| 70 mph (112.65 km/h) | 68.1 mph (109.6 km/h) |
| 75 mph (120.7 km/h) | 72.96 mph (117.42 km/h) |
| 80 mph (128.75 km/h) | 77.83 mph (125.25 km/h) |
| 85 mph (136.79 km/h) | 82.69 mph (133.08 km/h) |
| 90 mph (144.84 km/h) | 87.56 mph (140.91 km/h) |
| 95 mph (152.89 km/h) | 92.42 mph (148.74 km/h) |
| 100 mph (160.93 km/h) | 97.29 mph (156.57 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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