Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 285/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 37.95 (964) | 0.63 (16) 1.7% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 117.25 (2978.23) | 119.23 (3028.5) | 1.98 (50.27) 1.7% |
| Sidewall Height inches (mm) | 8.66 (220) | 8.98 (228) | 0.31 (8) 3.6% |
| Revolutions per mile (km) | 540.37 (335.77) | 531.4 (330.2) | -8.97 (-5.57) -1.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.34 mph (32.73 km/h) |
| 25 mph (40.23 km/h) | 25.42 mph (40.91 km/h) |
| 30 mph (48.28 km/h) | 30.51 mph (49.1 km/h) |
| 35 mph (56.33 km/h) | 35.59 mph (57.28 km/h) |
| 40 mph (64.37 km/h) | 40.68 mph (65.46 km/h) |
| 45 mph (72.42 km/h) | 45.76 mph (73.64 km/h) |
| 50 mph (80.47 km/h) | 50.84 mph (81.83 km/h) |
| 55 mph (88.51 km/h) | 55.93 mph (90.01 km/h) |
| 60 mph (96.56 km/h) | 61.01 mph (98.19 km/h) |
| 65 mph (104.61 km/h) | 66.1 mph (106.37 km/h) |
| 70 mph (112.65 km/h) | 71.18 mph (114.56 km/h) |
| 75 mph (120.7 km/h) | 76.27 mph (122.74 km/h) |
| 80 mph (128.75 km/h) | 81.35 mph (130.92 km/h) |
| 85 mph (136.79 km/h) | 86.43 mph (139.1 km/h) |
| 90 mph (144.84 km/h) | 91.52 mph (147.29 km/h) |
| 95 mph (152.89 km/h) | 96.6 mph (155.47 km/h) |
| 100 mph (160.93 km/h) | 101.69 mph (163.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1352 | 1571 | 1692 | 1767 | 1847 | 1905 | 1968 | 2043 | 2146 | 2250 | 2365 | 2457 | 2624 | 2808 | 2952 | 3044 | 3096 | 3286 | 3551 | 4126 |
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