Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-20 | 255/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.99 (838) | 31.04 (788.5) | -1.95 (-49.5) -5.9% |
| Width inches (mm) | 10.83 (275) | 10.04 (255) | -0.79 (-20) -7.3% |
| Circum. inches (mm) | 103.65 (2632.65) | 97.53 (2477.15) | -6.12 (-155.51) -5.9% |
| Sidewall Height inches (mm) | 6.5 (165) | 5.52 (140.25) | -0.97 (-24.75) -15% |
| Revolutions per mile (km) | 611.3 (379.84) | 649.68 (403.69) | 38.38 (23.85) 6.3% |
255/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.82 mph (30.29 km/h) |
| 25 mph (40.23 km/h) | 23.52 mph (37.86 km/h) |
| 30 mph (48.28 km/h) | 28.23 mph (45.43 km/h) |
| 35 mph (56.33 km/h) | 32.93 mph (53 km/h) |
| 40 mph (64.37 km/h) | 37.64 mph (60.57 km/h) |
| 45 mph (72.42 km/h) | 42.34 mph (68.14 km/h) |
| 50 mph (80.47 km/h) | 47.05 mph (75.71 km/h) |
| 55 mph (88.51 km/h) | 51.75 mph (83.29 km/h) |
| 60 mph (96.56 km/h) | 56.46 mph (90.86 km/h) |
| 65 mph (104.61 km/h) | 61.16 mph (98.43 km/h) |
| 70 mph (112.65 km/h) | 65.87 mph (106 km/h) |
| 75 mph (120.7 km/h) | 70.57 mph (113.57 km/h) |
| 80 mph (128.75 km/h) | 75.27 mph (121.14 km/h) |
| 85 mph (136.79 km/h) | 79.98 mph (128.71 km/h) |
| 90 mph (144.84 km/h) | 84.68 mph (136.29 km/h) |
| 95 mph (152.89 km/h) | 89.39 mph (143.86 km/h) |
| 100 mph (160.93 km/h) | 94.09 mph (151.43 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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