Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/82-15 | 285/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.65 (651.6) | 32.34 (821.5) | 6.69 (169.9) 26.1% |
| Width inches (mm) | 6.5 (165) | 11.22 (285) | 4.72 (120) 72.7% |
| Circum. inches (mm) | 80.59 (2047.06) | 101.61 (2580.82) | 21.01 (533.76) 26.1% |
| Sidewall Height inches (mm) | 5.33 (135.3) | 6.17 (156.75) | 0.84 (21.45) 15.9% |
| Revolutions per mile (km) | 786.17 (488.5) | 623.58 (387.47) | -162.59 (-101.03) -20.7% |
285/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.21 mph (40.58 km/h) |
| 25 mph (40.23 km/h) | 31.52 mph (50.72 km/h) |
| 30 mph (48.28 km/h) | 37.82 mph (60.87 km/h) |
| 35 mph (56.33 km/h) | 44.13 mph (71.01 km/h) |
| 40 mph (64.37 km/h) | 50.43 mph (81.16 km/h) |
| 45 mph (72.42 km/h) | 56.73 mph (91.3 km/h) |
| 50 mph (80.47 km/h) | 63.04 mph (101.45 km/h) |
| 55 mph (88.51 km/h) | 69.34 mph (111.59 km/h) |
| 60 mph (96.56 km/h) | 75.64 mph (121.74 km/h) |
| 65 mph (104.61 km/h) | 81.95 mph (131.88 km/h) |
| 70 mph (112.65 km/h) | 88.25 mph (142.03 km/h) |
| 75 mph (120.7 km/h) | 94.56 mph (152.17 km/h) |
| 80 mph (128.75 km/h) | 100.86 mph (162.32 km/h) |
| 85 mph (136.79 km/h) | 107.16 mph (172.46 km/h) |
| 90 mph (144.84 km/h) | 113.47 mph (182.61 km/h) |
| 95 mph (152.89 km/h) | 119.77 mph (192.75 km/h) |
| 100 mph (160.93 km/h) | 126.07 mph (202.9 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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