Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 275/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 38.41 (975.5) | 1.08 (27.5) 2.9% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 117.25 (2978.23) | 120.65 (3064.62) | 3.4 (86.39) 2.9% |
| Sidewall Height inches (mm) | 8.66 (220) | 9.2 (233.75) | 0.54 (13.75) 6.3% |
| Revolutions per mile (km) | 540.37 (335.77) | 525.14 (326.3) | -15.23 (-9.47) -2.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.58 mph (33.12 km/h) |
| 25 mph (40.23 km/h) | 25.73 mph (41.4 km/h) |
| 30 mph (48.28 km/h) | 30.87 mph (49.68 km/h) |
| 35 mph (56.33 km/h) | 36.02 mph (57.96 km/h) |
| 40 mph (64.37 km/h) | 41.16 mph (66.24 km/h) |
| 45 mph (72.42 km/h) | 46.31 mph (74.52 km/h) |
| 50 mph (80.47 km/h) | 51.45 mph (82.8 km/h) |
| 55 mph (88.51 km/h) | 56.6 mph (91.08 km/h) |
| 60 mph (96.56 km/h) | 61.74 mph (99.36 km/h) |
| 65 mph (104.61 km/h) | 66.89 mph (107.64 km/h) |
| 70 mph (112.65 km/h) | 72.03 mph (115.92 km/h) |
| 75 mph (120.7 km/h) | 77.18 mph (124.2 km/h) |
| 80 mph (128.75 km/h) | 82.32 mph (132.48 km/h) |
| 85 mph (136.79 km/h) | 87.47 mph (140.76 km/h) |
| 90 mph (144.84 km/h) | 92.61 mph (149.04 km/h) |
| 95 mph (152.89 km/h) | 97.76 mph (157.32 km/h) |
| 100 mph (160.93 km/h) | 102.9 mph (165.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1336 | 1552 | 1672 | 1746 | 1825 | 1882 | 1945 | 2019 | 2121 | 2223 | 2337 | 2428 | 2593 | 2775 | 2917 | 3008 | 3059 | 3247 | 3509 | 4077 |
Better Fuel Economy Factory Ratios Increased Power
