Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 275/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 35.32 (897.2) | -2 (-50.8) -5.4% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 117.25 (2978.23) | 110.97 (2818.64) | -6.28 (-159.59) -5.4% |
| Sidewall Height inches (mm) | 8.66 (220) | 8.66 (220) | 0 (0) 0% |
| Revolutions per mile (km) | 540.37 (335.77) | 570.97 (354.78) | 30.6 (19.01) 5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.93 mph (30.46 km/h) |
| 25 mph (40.23 km/h) | 23.66 mph (38.08 km/h) |
| 30 mph (48.28 km/h) | 28.39 mph (45.69 km/h) |
| 35 mph (56.33 km/h) | 33.12 mph (53.31 km/h) |
| 40 mph (64.37 km/h) | 37.86 mph (60.92 km/h) |
| 45 mph (72.42 km/h) | 42.59 mph (68.54 km/h) |
| 50 mph (80.47 km/h) | 47.32 mph (76.16 km/h) |
| 55 mph (88.51 km/h) | 52.05 mph (83.77 km/h) |
| 60 mph (96.56 km/h) | 56.78 mph (91.39 km/h) |
| 65 mph (104.61 km/h) | 61.52 mph (99 km/h) |
| 70 mph (112.65 km/h) | 66.25 mph (106.62 km/h) |
| 75 mph (120.7 km/h) | 70.98 mph (114.23 km/h) |
| 80 mph (128.75 km/h) | 75.71 mph (121.85 km/h) |
| 85 mph (136.79 km/h) | 80.45 mph (129.46 km/h) |
| 90 mph (144.84 km/h) | 85.18 mph (137.08 km/h) |
| 95 mph (152.89 km/h) | 89.91 mph (144.7 km/h) |
| 100 mph (160.93 km/h) | 94.64 mph (152.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1453 | 1688 | 1818 | 1898 | 1985 | 2047 | 2115 | 2195 | 2306 | 2418 | 2541 | 2640 | 2819 | 3017 | 3172 | 3271 | 3326 | 3530 | 3815 | 4433 |
Better Fuel Economy Factory Ratios Increased Power
