Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-20 | 285/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.5) | 32.34 (821.5) | 1.3 (33) 4.2% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 97.53 (2477.15) | 101.61 (2580.82) | 4.08 (103.67) 4.2% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 6.17 (156.75) | 0.65 (16.5) 11.8% |
| Revolutions per mile (km) | 649.68 (403.69) | 623.58 (387.47) | -26.1 (-16.22) -4% |
285/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.84 mph (33.53 km/h) |
| 25 mph (40.23 km/h) | 26.05 mph (41.92 km/h) |
| 30 mph (48.28 km/h) | 31.26 mph (50.3 km/h) |
| 35 mph (56.33 km/h) | 36.46 mph (58.68 km/h) |
| 40 mph (64.37 km/h) | 41.67 mph (67.07 km/h) |
| 45 mph (72.42 km/h) | 46.88 mph (75.45 km/h) |
| 50 mph (80.47 km/h) | 52.09 mph (83.84 km/h) |
| 55 mph (88.51 km/h) | 57.3 mph (92.22 km/h) |
| 60 mph (96.56 km/h) | 62.51 mph (100.6 km/h) |
| 65 mph (104.61 km/h) | 67.72 mph (108.99 km/h) |
| 70 mph (112.65 km/h) | 72.93 mph (117.37 km/h) |
| 75 mph (120.7 km/h) | 78.14 mph (125.75 km/h) |
| 80 mph (128.75 km/h) | 83.35 mph (134.14 km/h) |
| 85 mph (136.79 km/h) | 88.56 mph (142.52 km/h) |
| 90 mph (144.84 km/h) | 93.77 mph (150.9 km/h) |
| 95 mph (152.89 km/h) | 98.98 mph (159.29 km/h) |
| 100 mph (160.93 km/h) | 104.19 mph (167.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1587 | 1843 | 1985 | 2073 | 2168 | 2235 | 2309 | 2397 | 2519 | 2640 | 2775 | 2883 | 3079 | 3295 | 3464 | 3572 | 3633 | 3856 | 4166 | 4842 |
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