Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/85-16 | 185/55-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.37 (644.4) | 24.01 (609.9) | -1.36 (-34.5) -5.4% |
| Width inches (mm) | 5.51 (140) | 7.28 (185) | 1.77 (45) 32.1% |
| Circum. inches (mm) | 79.7 (2024.44) | 75.44 (1916.06) | -4.27 (-108.38) -5.4% |
| Sidewall Height inches (mm) | 4.69 (119) | 4.01 (101.75) | -0.68 (-17.25) -14.5% |
| Revolutions per mile (km) | 794.96 (493.96) | 839.92 (521.9) | 44.97 (27.94) 5.7% |
185/55-16 Tires
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 (45.7 km/h) |
| 35 mph (56.33 km/h) | 33.13 mph (53.31 km/h) |
| 40 mph (64.37 km/h) | 37.86 mph (60.93 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) | 52.06 mph (83.78 km/h) |
| 60 mph (96.56 km/h) | 56.79 mph (91.39 km/h) |
| 65 mph (104.61 km/h) | 61.52 mph (99.01 km/h) |
| 70 mph (112.65 km/h) | 66.25 mph (106.62 km/h) |
| 75 mph (120.7 km/h) | 70.98 mph (114.24 km/h) |
| 80 mph (128.75 km/h) | 75.72 mph (121.85 km/h) |
| 85 mph (136.79 km/h) | 80.45 mph (129.47 km/h) |
| 90 mph (144.84 km/h) | 85.18 mph (137.09 km/h) |
| 95 mph (152.89 km/h) | 89.91 mph (144.7 km/h) |
| 100 mph (160.93 km/h) | 94.65 mph (152.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2137 | 2483 | 2674 | 2792 | 2920 | 3011 | 3111 | 3229 | 3393 | 3556 | 3738 | 3884 | 4148 | 4439 | 4666 | 4812 | 4893 | 5194 | 5612 | 6521 |
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