Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-20 | 275/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.66 (728) | 30.83 (783) | 2.17 (55) 7.6% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 90.04 (2287.08) | 96.85 (2459.87) | 6.8 (172.79) 7.6% |
| Sidewall Height inches (mm) | 4.33 (110) | 5.41 (137.5) | 1.08 (27.5) 25% |
| Revolutions per mile (km) | 703.67 (437.24) | 654.24 (406.53) | -49.43 (-30.71) -7% |
275/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.51 mph (34.62 km/h) |
| 25 mph (40.23 km/h) | 26.89 mph (43.27 km/h) |
| 30 mph (48.28 km/h) | 32.27 mph (51.93 km/h) |
| 35 mph (56.33 km/h) | 37.64 mph (60.58 km/h) |
| 40 mph (64.37 km/h) | 43.02 mph (69.24 km/h) |
| 45 mph (72.42 km/h) | 48.4 mph (77.89 km/h) |
| 50 mph (80.47 km/h) | 53.78 mph (86.55 km/h) |
| 55 mph (88.51 km/h) | 59.16 mph (95.2 km/h) |
| 60 mph (96.56 km/h) | 64.53 mph (103.86 km/h) |
| 65 mph (104.61 km/h) | 69.91 mph (112.51 km/h) |
| 70 mph (112.65 km/h) | 75.29 mph (121.17 km/h) |
| 75 mph (120.7 km/h) | 80.67 mph (129.82 km/h) |
| 80 mph (128.75 km/h) | 86.04 mph (138.47 km/h) |
| 85 mph (136.79 km/h) | 91.42 mph (147.13 km/h) |
| 90 mph (144.84 km/h) | 96.8 mph (155.78 km/h) |
| 95 mph (152.89 km/h) | 102.18 mph (164.44 km/h) |
| 100 mph (160.93 km/h) | 107.55 mph (173.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1665 | 1934 | 2083 | 2175 | 2274 | 2345 | 2423 | 2515 | 2643 | 2770 | 2912 | 3025 | 3231 | 3457 | 3634 | 3748 | 3812 | 4045 | 4371 | 5080 |
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