Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-19 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.76 (730.6) | 28.66 (728) | -0.1 (-2.6) -0.4% |
| Width inches (mm) | 6.1 (155) | 10.83 (275) | 4.72 (120) 77.4% |
| Circum. inches (mm) | 90.36 (2295.25) | 90.04 (2287.08) | -0.32 (-8.17) -0.4% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.33 (110) | -0.55 (-14) -11.3% |
| Revolutions per mile (km) | 701.16 (435.68) | 703.67 (437.24) | 2.5 (1.56) 0.4% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.93 mph (32.07 km/h) |
| 25 mph (40.23 km/h) | 24.91 mph (40.09 km/h) |
| 30 mph (48.28 km/h) | 29.89 mph (48.11 km/h) |
| 35 mph (56.33 km/h) | 34.88 mph (56.13 km/h) |
| 40 mph (64.37 km/h) | 39.86 mph (64.14 km/h) |
| 45 mph (72.42 km/h) | 44.84 mph (72.16 km/h) |
| 50 mph (80.47 km/h) | 49.82 mph (80.18 km/h) |
| 55 mph (88.51 km/h) | 54.8 mph (88.2 km/h) |
| 60 mph (96.56 km/h) | 59.79 mph (96.22 km/h) |
| 65 mph (104.61 km/h) | 64.77 mph (104.24 km/h) |
| 70 mph (112.65 km/h) | 69.75 mph (112.25 km/h) |
| 75 mph (120.7 km/h) | 74.73 mph (120.27 km/h) |
| 80 mph (128.75 km/h) | 79.72 mph (128.29 km/h) |
| 85 mph (136.79 km/h) | 84.7 mph (136.31 km/h) |
| 90 mph (144.84 km/h) | 89.68 mph (144.33 km/h) |
| 95 mph (152.89 km/h) | 94.66 mph (152.34 km/h) |
| 100 mph (160.93 km/h) | 99.64 mph (160.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1791 | 2080 | 2240 | 2339 | 2446 | 2522 | 2606 | 2705 | 2842 | 2979 | 3132 | 3254 | 3475 | 3719 | 3909 | 4031 | 4100 | 4351 | 4702 | 5464 |
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