Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-20 | 275/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.83 (783) | 35.32 (897.2) | 4.5 (114.2) 14.6% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 96.85 (2459.87) | 110.97 (2818.64) | 14.12 (358.77) 14.6% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 8.66 (220) | 3.25 (82.5) 60% |
| Revolutions per mile (km) | 654.24 (406.53) | 570.97 (354.78) | -83.27 (-51.74) -12.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.92 mph (36.88 km/h) |
| 25 mph (40.23 km/h) | 28.65 mph (46.1 km/h) |
| 30 mph (48.28 km/h) | 34.38 mph (55.32 km/h) |
| 35 mph (56.33 km/h) | 40.1 mph (64.54 km/h) |
| 40 mph (64.37 km/h) | 45.83 mph (73.76 km/h) |
| 45 mph (72.42 km/h) | 51.56 mph (82.98 km/h) |
| 50 mph (80.47 km/h) | 57.29 mph (92.2 km/h) |
| 55 mph (88.51 km/h) | 63.02 mph (101.42 km/h) |
| 60 mph (96.56 km/h) | 68.75 mph (110.64 km/h) |
| 65 mph (104.61 km/h) | 74.48 mph (119.86 km/h) |
| 70 mph (112.65 km/h) | 80.21 mph (129.08 km/h) |
| 75 mph (120.7 km/h) | 85.94 mph (138.31 km/h) |
| 80 mph (128.75 km/h) | 91.67 mph (147.53 km/h) |
| 85 mph (136.79 km/h) | 97.4 mph (156.75 km/h) |
| 90 mph (144.84 km/h) | 103.13 mph (165.97 km/h) |
| 95 mph (152.89 km/h) | 108.86 mph (175.19 km/h) |
| 100 mph (160.93 km/h) | 114.58 mph (184.41 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 |
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